(1) Lecture on Adolescent Physiology and Health Knowledge for Sixth Grade Girls Dear students, today, I will give a special lecture on adolescent physiology and health knowledge for girls under the arrangement of the school, which is a very meaningful activity. Its main purpose is to let students know the knowledge of adolescence and realize that adolescence is the most beautiful and precious period in life, so as to know how to spend adolescence smoothly. Let's talk to our classmates in three questions: 1. What is adolescence? Everyone will go through infancy, infancy, childhood, adolescence, adulthood and old age from birth. This is a necessary process from birth, growth, development to aging. The transition period from childhood to adulthood is called "adolescence", or adolescence is the transition period from immature sexual function to maturity. Second, adolescent knowledge 1) Understand that the sign of sexual maturity of menstrual women is regular ovulation every month. This regular ovulation is characterized by regular menstrual cramps. The formation of menstruation is closely related to the periodic changes of ovary and uterus. Since puberty, women's endometrium has undergone periodic changes under the action of hormones secreted by ovaries, the most significant of which is periodic shedding and bleeding of endometrium. This periodic change is called menstrual cycle. The first menstrual period is called menarche. Menarche is generally between 12 and 18 years old, and is often affected by the environment, such as good living conditions, rapid physical development and early menarche; Another example is the influence of geography and latitude-menarche is early in tropical areas and late in cold areas; Another example is early menarche, good nutrition and good health. In China, on the whole, the age of menarche of urban girls is earlier than that of rural girls. Even for girls in the same class, the age of menarche varies greatly. However, it should be pointed out that if 18 years old still has no menstruation, it is best to go to the hospital for gynecological examination. Menstruation is a natural physiological phenomenon that occurs automatically when a girl's physiology develops to a certain extent, and it is not controlled by human will. From the first day of menstruation to the day before the next menstruation, it is usually called a menstrual cycle. The average menstrual cycle is about 28 days, and it is normal within 2 1-35 days. Girls will also find that their menstruation is irregular, sometimes it will appear every month, sometimes there will be no movement for two or three months, and sometimes the menstrual flow will be less. This is because in adolescence, the functions of the ovaries and uterus of girls are not balanced, so it is normal to have irregular menstrual cycles in the years after menarche. Life changes and emotional changes, such as transfer, relocation, travel or examination, will affect the length of menstrual cycle and menstrual flow. Even after adulthood, the length of menstrual cycle will vary from person to person. Precursor of menarche: If you find the following changes in your body, it means menarche is coming. * After the second stage of breast development. * sudden increase in weight and height. * Axillary hair and pubic hair growing near the genitals. * There are some white secretions on underwear, commonly known as leucorrhea. Menstruation is generally just a little menstrual blood flowing in underwear, and the color is not necessarily bright red, but may also be brown. Normal menstrual bleeding: the menstrual period is about 3-5 days, that is, 1-5 days of the menstrual cycle. Generally, there is more bleeding on the second or third day of menstruation. The amount of bleeding during each menstrual period is generally about 50 ml, about 4-8 tablespoons. Such menstrual blood is not enough to cause anemia in women, just keep a balanced diet. Girls with early or late menarche have more menstrual flow than girls with normal menarche age (menarche age 13- 15). Menstrual blood is different from the blood we shed when we were injured. Except for a small part of blood, most of it is exfoliated endometrium. It is thicker than ordinary blood, generally dark red, thick without blood clots, mixed with endometrial debris and mucus, and slightly fishy. In the menstrual cycle, proper bleeding is of great significance for washing the necrotic tissue of uterus and ensuring the repair of functional layer. Of course, the wound caused by endometrial shedding is easy to be infected with germs, so attention should be paid to menstrual health care. Adolescent health care knowledge 2) menstrual care As mentioned earlier, the most obvious change for women to enter adolescence is menstruation. What the hell is going on here? It turns out that the endometrium changes periodically under the action of estrogen secreted by the ovary, and the most obvious change is the periodic shedding and bleeding of the endometrium. This periodic change is called menstrual cycle. The average menstrual cycle is about 28 days, which is slightly different for different people. Even for the same person, the duration before and after each menstrual cycle is different. Generally, it can be regarded as normal between 2 1-40 days. The first menstruation of a girl after puberty is called menarche. The age of menarche can reflect the development of human body. Some people are earlier, others are later, which is generally normal. Menstrual bleeding usually lasts for 3-5 days, but it is normal within two days to a week. When female students come to menstruation, the menstrual cycle may be irregular, sometimes once every half month, sometimes once every two or three months, and sometimes the amount of bleeding is small. Most of them become routine in a year or so. Here we need to focus on menstrual hygiene. During menstruation, the endometrium has a wound because it falls off. Because menstrual blood flows out of the uterus and the cervix is slightly open, it is easy for germs to invade and multiply, which will cause infection. Because the brain excitability decreases during menstruation, the whole body resistance decreases, the body is easy to get tired, and it is also easy to catch a cold or suffer from other diseases. Therefore, it is very important to protect the menstrual period of adolescent girls. (1) Pay attention to food hygiene and strengthen nutrition: during menstruation, you can eat some easily digested and absorbed foods, such as eggs, lean meat, bean products, vegetables and fruits. At the same time, drink plenty of boiled water, increase the frequency of urination, and flush the urethra to prevent inflammation. Do not eat cold and spicy things, keep the stool unobstructed and reduce pelvic congestion. (2) Pay attention to keep warm: During menstruation, the body's resistance drops and the pelvic cavity is congested. Keep warm. Avoid getting wet in the rain, wading, swimming or taking a bath with cold water, washing your hair and feet, and it is best not to sit on the wet ground. Don't drink too many cold drinks in summer, so as not to catch cold, catch cold, stimulate pelvic vasoconstriction, lead to decreased menstrual flow or sudden menopause, and cause other diseases. (3) Keep the vulva clean: Always clean the vulva with clean warm water to avoid scabbing during menstruation. When cleaning vulva, don't soak your lower body in water. Prevent dirty water from infiltrating into vagina. Can't wash vulva with foot towel and feet. The basin for washing vulva should also be separated from the footbath. Wipe the toilet paper from front to back after defecation to avoid bringing bacteria around anus to vulva. (4) Properly control the amount of exercise: pay attention to rest during menstruation, keep enough sleep, and enhance the body's resistance. Avoid strenuous exercise and heavy physical labor. If female students go to physical education class during menstruation, they can explain the situation to the teacher and take part in some relaxing sports, such as gymnastics, walking, playing badminton or table tennis. (5) Make a good record of menstrual cycle: You can observe whether your menstruation is regular by recording, and it is also convenient for you to prepare before menstruation. If menstruation does not come according to the date, you should go to the doctor in time to find out the reason. (6) Maintain optimistic and stable emotions: During menstruation, girls often feel irritable, irritable or depressed due to some physical discomfort, such as breast pain, backache, abdominal distension, headache, etc. Emotional fluctuations in turn affect menstruation. Maintaining a good mood and self-regulating emotions can reduce menstrual discomfort and prevent menstrual disorders. (7) Record the menstrual cycle. With the gradual regularity of menstrual cycle, learn to record the date of each menstrual cycle, master the interval time and menstrual days of each menstrual cycle, so as to roughly estimate the date of the next menstrual cycle and make preparations in advance. For example, prepare sanitary napkins in advance and put them in your schoolbag to avoid the embarrassment and trouble caused by unexpected menstruation. (8) Avoid overwork. Avoid excessive physical labor and strenuous physical exercise, but you can participate in moderate and light exercise and labor to promote pelvic blood circulation and relieve menstrual discomfort and lower abdominal pain. 3) Understand the breast 1 and the five stages of breast development: the first stage: childhood, the breast is flat, the chest is flat, and only the nipple protrudes. The second stage: breast germination. The breast and adipose tissue form a button-sized bulge, the nipple begins to get bigger, and the areola expands to form areola swelling. Nipples and areola darken. The third stage: the breast and areola begin to develop. At this time, the nipple and areola are swollen, the mammary duct protrudes outward, and the breast will be more round than before. The areola is wider and darker. During this period, a swelling and painful lump will appear around the nipple. If you accidentally touch it, your nipples will hurt. This is the areola stage, and the breasts are tapered. The fourth stage: the nipple and areola protrude slightly to the breast, the breast bulge is faintly visible, and the breast is gradually hemispherical. The fifth stage: nipple, areola and other breast parts develop into the shape of a fully mature breast. The breasts are plump, and small holes appear on the nipples, which is convenient for later milk discharge. The development of breasts varies from person to person, with different development speed, size and time. Puberty breast development marks the beginning of girls' maturity, which is a normal physiological phenomenon. Prominent breasts also reflect the unique curvaceous beauty of women's figure, and more importantly, they prepare conditions for breastfeeding in the future. Therefore, we should learn the correct knowledge of breast health care, overcome shyness, hold out our chest and show a confident smile. 2, bra selection Wearing the right bra at the right time is very important for protecting and supporting the breast. As for when to start wearing bras, it depends on your own situation. Generally speaking, the best time to wear a bra should be when you feel the need. If your breasts make you uncomfortable during exercise, you can wear a bra. When you feel that your chest has become the focus of attention, you'd better start wearing a bra. Or when most of the girls on duty are already wearing bras, and you don't want to be considered different, you can also choose bras. Female student 15 years old, with basically stereotyped breasts. At this time, they should put on their bras in time. How to choose the right bra: Because everyone's body shape and bust size are different, you must learn to choose the right size bra to make people feel comfortable without feeling tight. The bra size selection should refer to three dimensions: one is the bust at the base of the breast (below the breast line), the other is the bust at the top of the breast (above the breast line), and the third is the shortest distance between two nipples (nipple spacing). If the bra can fit three dimensions of your body at the same time, it is very suitable for you. Because the breasts and breasts are still developing, it is necessary to change the bra in time, and don't blindly pursue the beauty of the body and reluctantly put on an inappropriate bra. It's best to choose cotton bra, and those padded sponge bras are not suitable for developing girls. Bras should be washed and changed frequently and kept clean. Take off your bra when you sleep at night. Don't be shy because your breasts are too big. Wearing a bra with a small bra will not only hinder the development of the chest, but also oppress the breast tissue and affect the normal development of the breast. Some girls' breasts develop late and are very small. Even in adolescence, they still can't reach fullness. If you wear a bra too early, especially a bra with padding such as hard lining and sponge, it will affect the continued development of the breast, and sometimes the hard lining will scratch the nipple. Of course, in the case that almost all female students wear bras, it is not bad to wear them as exercise in advance out of a sense of identity. 3, breast hygiene: adolescent girls due to endocrine reasons, before and after the menstrual cycle, there may be breast pain, nipple itching phenomenon, then do not squeeze the breast at will, pick up the nipple, so as not to cause breach, infection. Always clean breasts, especially areola and nipples, and keep them clean and hygienic. (2) Lecture on adolescent mental health knowledge of sixth-grade girls-paying attention to mental health and promoting students' happy growth Dear students: Hello! I wonder if the students are aware of the change. What is this change? This is the problem of our physical development that people often mention. I think the students here know better than I do, whether we admit it or not, this is indeed a fact. You or your partner are growing up. Today, we just invited female students from your to discuss some puzzles and problems we have to face. 1. How to normally contact students of the opposite sex and associate with boys and girls in adolescence? Contact is normal and necessary. When a problem cannot be understood, students who know it need to help you. He's not a male classmate. Can't he ask for advice? It is good for boys and girls to learn from each other and help each other. However, during this period, boys and girls are still very simple and naive, studying together, getting along with each other day and night, and never like to meet and contact. At this time, if they don't pay attention, they will shift their study mind to pay attention to the opposite sex, and they won't pay attention in class (thinking about their own thoughts). This is called learning distraction, which affects learning. At this time, if they don't understand correctly, they will delay. Even ruined youth. Then, how to contact, communicate and get along with the opposite sex students is not easy to fall into this misunderstanding? How to make better use of this critical period of adolescence to lay a good foundation for learning and better physical and mental growth? This requires the correct guidance of adults. What I want to say to my classmates is one sentence: concentrate on your studies. To do this, we must ensure that we know two things: first, we must set up lofty ideals and learn from great women, such as Madame Curie and Soong Ching Ling, how they spent their adolescence when they were young. Second, you must be clear about your current learning task, and how many people expect you to become a talent! At the same time, we should know that boys and girls should get along with each other sincerely, and friendship is pure. Especially female students, are like blooming flowers. They should lead an honest and clean life and respect themselves, so as to make bloom more colorful instead of dying prematurely. Another problem is that female students love to dress up. We should understand that beauty should be the unity of spiritual beauty and external beauty. Second, how to be a self-confident, self-respecting and self-loving person Seiji Ozawa's story: Seiji Ozawa is a world-famous music conductor. Once he went to Europe to take part in a command competition and came last in the final. The judges handed him a piece of music, and Seiji Ozawa conducted it attentively and made some preparations. Suddenly, he found a little disharmony in the music. At first, he thought it was a mistake, so he directed the band to stop performing, but he still felt unnatural. He thinks there is something wrong with the music. But the composer present and the authority of the jury all said that there would be no problem with the score, which was his illusion. Faced with hundreds of international music authorities, he could not help but shake his judgment. However, he thought twice and firmly believed that his judgment was correct. So he said loudly, "No! The score is definitely wrong! " As soon as his voice fell, the judges on the judging platform immediately stood up and gave him warm applause to congratulate him on winning the competition. It turns out that this is a trap carefully designed by the judges to test whether the conductor can stick to his own judgment when he finds a mistake and the authorities don't admit it, because only a person with this quality can really be called a world-class music conductor. Among the three contestants, only Seiji Ozawa believed in herself and disagreed with the authoritative opinions, thus winning the World Music Conductor Competition. Self-confidence is a strength. Regardless of good times and bad times, we should smile and face life calmly. With self-confidence, there will be hope in life. "Since God has given talent, let it go and be hired!" Even if fate plays tricks on us again and again, as long as you have self-confidence and a self-improvement and positive heart, success will belong to you sooner or later. Of course, self-confidence should be measured, otherwise, overconfidence will lead to arrogance and inevitably lead to failure. Looking up is beautiful: Jenny is a little girl who always lowers her head. She always feels that she is not beautiful enough. One day, she went to the jewelry store and bought a green bow. The shopkeeper kept praising her for wearing a beautiful bow. Although Jenny doesn't believe it, she is very happy. She couldn't help raising her head, eager to show it to everyone. It doesn't matter if she accidentally bumped into someone when she went out. Jenny walked into the classroom and met her teacher head-on. "Jenny, how beautiful you look with your head held high!" "The teacher lovingly patted her on the shoulder and said. That day, she was praised by many people. She thought it must be a bow, but when she looked in front of the mirror, there was no bow on her head. She must have lost it when she came out of the jewelry store. Self-confidence is a kind of beauty, but many people lose a lot of happiness because they care too much about appearance. Tips: Whether you are poor or rich, whether you look like a fairy or plain, as long as you hold your head high, happiness will make you cute-the kind that everyone likes. In fact, if adolescence is handled well, it is relaxed and happy. I hope the students can successfully spend their adolescence, the best time of their lives, so that growth is no longer full of troubles and your flowers are more beautiful. Third, how do girls protect themselves? Our society is a big classroom and a big dye vat. In the complicated social environment, how should our female classmates learn to protect themselves? 1, be vigilant to prevent bad people with bad faith and good people with good faith. 2. Don't read or review your lessons in remote places such as parks, rivers and trees by yourself or several lesbians. Don't wave for a ride by one person or several female classmates. 4. Don't go to any bars or dance halls. Don't run away from home in anger when you are in conflict with your parents. 6. Don't be too exposed when wearing clothes. 7. Don't be greedy and cheap, and be careful of the excessive attention of others. 8. Ask for directions in a strange place, and don't follow people who are willing to lead the way alone. Adolescence is an important stage of everyone's growth and development, and adolescence is beautiful. Let's grasp the beautiful adolescence, self-esteem, self-love, self-confidence, self-reliance and self-improvement, depict gorgeous youth and create a brilliant life!