Height, weight, blood type, fingerprint, skin color, method, color, etc. Those who do the appraisal are the best data respondents: user 8303 16- manager level 4 2-2811:241. The largest organ of human body-skin II. Mature egg cell 3, the largest cell in human body. Spleen 4, the largest lymphatic organ in human body. The largest human body. Large exocrine gland-liver 6. The smallest bone in the human body-ossicles 7. The longest bone in the human body-femur 8. The most powerful skeletal muscle in human body-gastrocnemius 9. The hardest substance in human body structure-enamel 10. The highest nerve center in human body-cerebral cortex 1 1. The thickest skin of human body-palms and soles of feet. Skin 13. Hepatic portal vein 14. Renal vein 15. Pulmonary vein 16. Thyroid 17. The most important endocrine organ-pituitary gland. Vascular-capillary 19. The smallest lymphatic vessel in the human body-lymphatic capillary 20. The most important section of human digestive tract-small intestine 2 1. The most diverse tissue in the human body-connective tissue. Connective tissue, the most widely distributed tissue in the human body, which vitamins can be synthesized by the human body as trace substances necessary for human growth and health? Most of them can't be synthesized by the human body and can only be ingested from food. Except vitamin D, vitamin D is a kind of vitamin that the human body can synthesize by itself, and it is the only element in the vitamin family that can be synthesized by the human body. My main function in the human body is to promote the normal growth of bones and the ossification of cartilage. I am also a fat-soluble vitamin, which is stored in human fat and slowly excreted. If I take too much vitamin D, I will be poisoned. There is natural vitamin D in these foods, and cod liver oil is extracted from the liver of marine fish. Ergosterol in fresh vegetables, yeast and other plant foods can be transformed into vitamin D2 for human use after ultraviolet irradiation. Human body system The human body is composed of bones, muscles, tissues, organs, exercise, blood circulation, respiration, digestion, urine, reproduction, nerves, endocrine and other systems. Among them, the nervous system coordinates the functions of the whole human body and receives external information through sensory organs. Human tissues and bones are composed of about 200 bones, forming a solid and flexible skeleton. The contraction of muscles ensures that the joints between different bones can move freely: muscles attach to the bones at both ends of the joints and cause joint movement when contracting. Bones, joints and muscles form a movement system. Internal organs are mainly located in the trunk of human body. The trunk is divided into three parts from top to bottom: chest, abdominal cavity and pelvic cavity. The heart and lungs are hidden in the chest composed of ribs and sternum. The diaphragm separates the abdominal cavity from the chest cavity. Most digestive organs, kidneys and spleen are located in the abdominal cavity. There are bladder, end of digestive tract and female reproductive organs in pelvic cavity. The brain and spinal cord constitute the central nervous system. The brain is located in the skull. The skull has a relative protective effect on the brain, while the spinal cord is hidden in the bone tubes piled up in the vertebrae. According to the theory of traditional Chinese medicine, the human body has more than 400 acupoints. It is generally believed in martial arts that there are 365 acupoints in the human body. Scientific analysis shows that the average weight per kilogram contains 70 ml ~ 80 ml of blood (accounting for 7% ~ 8% of the weight), and the average human body contains about 4.7 liters of blood. Comprise a cell and a liquid part. Cells account for about 45% of human blood volume, including red blood cells, white blood cells and platelets. All these ingredients come from stem cells made from bone marrow in the body. The liquid part accounts for the remaining 55% of the blood volume and consists of plasma and soluble blood proteins. How much water should the human body supplement every day? Average water consumption (through respiratory tract, urine and skin, etc. ) It is about 2500 ml per day, except that the metabolism of substances in the body can oxidize 300 ml of raw water. To put it simply: drink water on an empty stomach before meals, and drink soup and water while eating. How many muscles does the human body have? There are about 639 muscles in the whole body. It consists of about 6 billion muscle fibers, the longest is 60 cm, the shortest is only about 1 mm, the big muscle weighs 2000 grams, and the small muscle is only a few grams. The average person's muscle accounts for 35-45% of the body weight. The total length of capillaries in muscle can reach 654.38+ million kilometers, which can circle the earth twice and a half times. What are the five senses of the human body? The so-called "five senses" refer to the five organs of the human body, such as ears, eyebrows, eyes, nose and mouth. Moreover, in physiognomy, they were given the following nouns: (1) Er: the name is "Tingguan". (2) Eyebrow: called "longevity officer". (3) Eye: named "Special Commissioner". (4) Nose: It is called the "judge". (5) Mouth: called "cashier". The human body needs those main nutrients. The human body needs seven kinds of nutrients, among which macro nutrients include sugar, lipid, protein and water, and micro nutrients include vitamins, minerals and dietary fiber. Sugar substances (carbohydrates): provide energy, provide substances and play various functions; Lipid substances: protect lubrication, provide energy and provide substances. Protein, amino acids: provide material, play many important functions and provide energy. Vitamins: Assist enzymes to play a catalytic role and participate in physiological and biochemical processes in the body. Minerals: Assist enzymes to play a catalytic role, and play a role in regulation, control and signal transmission. Water: the main medium of internal circulation, the key component of internal balance, and participates in some biochemical processes. Dietary fiber: change the distribution of intestinal flora, activate beneficial bacteria, improve excretion and clean intestinal tract. What is the density of the human body? The average density is equivalent to the density of liquid water at 4 degrees Celsius, which is why some people can easily float on the water to see the sky! How many cells does the human body consist of? 1. The human body consists of about 50 billion cells, and each cell center has a nucleus. Each nucleus contains 23 pairs of chromosomes, which inherit the genetic material of parents respectively. Each chromosome contains double helix DNA molecules, and genes with genetic factors are arranged on the double helix ladder of DNA. There are 225 genes on chromosome 2 1, and 127 known genes have been identified. The functions of 103 genes have been determined, and 98 genes have been partially identified. Among them, 14 genes have been considered as the cause of hereditary diseases. 3. There are 23 pairs of chromosomes in each cell of human body, and it is estimated that there are100000 genes on the chromosome. The basic unit of these genes is DNA. The composition and operation of genes determine our genetic characteristics, such as height, obesity, susceptibility to disease or aging. Each gene consists of four coding sequences, named "A, G, T, C" respectively, and each coding is a base. A complete set of human DNA consists of 3 billion base pairs. Scientists try to arrange these three billion base pairs correctly and clearly mark their positions on chromosomes, which is the so-called human gene map. 4. The human genetic map contains the genetic code of about 3 billion base pairs. According to the latest map analysis, it is estimated that the number of human genes is about 30 thousand to 40 thousand. 5. Of the human 1 00000 genes, about100000 are functional genes that can produce protein, and only 400 to 600 genes can be mastered by scientists. For example, growth hormone and insulin are produced by specific functional genes, and there are more than 9,000 kinds to be studied. 6. Human genes, 97% of which are still unknown [1]. The total number of human cells is about 50 billion, and each cell has a DNA code of 3 billion letters. The DNA in each cell is 6 feet long, but it is squeezed into a structure with a diameter of only 0.0004 inch. [2] The four letters "A, G, T and C" that make up DNA carry the codes that make up all living things, and the three letters are combined with one amino acid. [3] Twenty different amino acids in human body can be arranged and combined into various protein, such as keratin in hair and hemoglobin in bone. [4] It is estimated that there are about 30,000 to 40,000 human genes, about19,000 ascaris (nematodes), about 6,000 enzymes and about 4,000 mycobacterium tuberculosis. Respondents: Hou bin 365 1- Jinshi comes from Grade 8 2-28 1 1:4 1 height, weight, blood type, fingerprint, skin color, normal skin color, measurements, etc. Use data to represent the number of body parts, such as the weight and size of internal organs. The total number of cells in the body: about1000 trillion brain cells: about1400 million brain cells. At the age of 3, the number of brain cells reached this level, and it decreased year by year from the age of 25. Brain weight: male 1350g. Female 1250g Hair output:10 ~ 200,000 sheets Daily saliva secretion: 1 ~ 1.5l Heart weight: 260 ~ 300g, which is about the size of an adult's fist. Vital capacity: 3 ~ 4 liters for men and 2 ~ 3 liters for women are the largest air volume in the lungs. Total number of alveoli: About 300 million alveoli are small vesicles that exchange oxygen and carbon dioxide in the lungs, and they are all as big as a tennis court. Stomach intake: 14 ~ 2.4 liters; Small intestine length: 5 ~ 6 meters; The total area of the intestinal wall is equivalent to a tennis court. Length of large intestine: about1.5m; Liver weight: 500g ~ 65,438+0,500 g, the largest and heaviest organ in internal organs. Kidney weight: 1.20 ~ 1.50 grams of urine a day: about 1 liter of water. The more you drink, the more you sweat, the less you sweat. Number of bones: about 206 skeletal muscles: more than 500 skins, total area: 1.2 ~ 1.6 square meters, number of pores: about 2 million bodies, water ratio: 60% of body weight, blood volume: about 8% of body weight.