Observe the composition of snails 1 Snails are an interesting little animal. I even raised snails! It has a big round snail shell. Transparent body is flexible. Two tentacles stretched forward, as if exploring the road. I have observed its tentacles, and its tentacles are quite long! As long as I gently touch its tentacles, it will immediately retract its tentacles.
After a while, it saw that there was no danger and quietly put its head out. Snails like to live in vegetable fields. Although climbing slowly, I feel very sensitive. As long as someone touches it gently, it will quickly shrink back to protect itself from others.
Snails can be seen everywhere every time it rains. Some are chasing each other, some are playing alone, and some are leisurely "walking" on high leaves. Snails stick out their tongues full of small hooks to lick food when they eat, and hook the food into small pieces and send them into their mouths. They often eat young grass leaves, but sometimes they also eat green leaves. Snails are natural enemies of fireflies and may be eaten by fireflies at any time.
I found this. What other secrets have you discovered about snails? Come and share it with everyone!
Observe the composition of snails. 2 Snails crawl on their stomach, very slowly. Test the crawling speed of snails on different materials, and prepare glass, tiles and cardboard. First, put the feeding snail on the glass, put a square next to it, and tie a small piece of apple with thin thread to lure it. The food is about 5-6 cm within the snail's range. After a while, the snail came out of its shell and found that the apple was crawling towards it, gently pulling the thin line parallel to the edge of the ruler, so that the snail could only see and smell but could not eat the apple. The hungry snail had to climb along the ruler to eat the apple. Taking the tail of the snail's belly as the starting point and the end point, after 60 seconds, the crawling distance from the ruler is 12 cm, the calculated crawling speed is 0.2 cm/s, and the crawling speeds are 0.10.5 cm/s and 0. 1 cm/s respectively. Snails crawl at different speeds on different materials, and glass climbs faster than cardboard. The reason is that the glass is smooth and the resistance is small. Observation conclusion: Snails crawl really slowly.
Abdominal foot movement and uniform crawling
Observing the three test experiments, although the speed is different, it is found that the speed remains the same during each crawling process. The crawling speed of snails is directly related to the movement of gastropods. Observing the gastropod of the crawling snail from the back of the glass, we can see that the gastropod muscles contract from back to front, and at the same time stick to the surface of the object to prevent it from sliding backwards. When contracted to the front, the ventral foot is released and the snail can fully extend and slide forward. Abdominal foot muscles contract in waves. After observing for a long time, it was found that the contraction frequency of wave type was constant, and the snail crawled on its arm, and its movement rhythm was consistent, so as to judge that the movement of abdomen and feet was uniform. The results of reasoning test show that snails do crawl at a constant speed.
Observe the composition of snails 3. There is a new member in my family, snails. It is small and dark, so I call it "Gary the Snail". It goes to bed early and gets up early every day. Every night, before I go to sleep, it has been "sleeping soundly" in that small room. In the morning, I got up in a hurry and visited it. I didn't expect it to be a "fitness" with a thick shell on my back.
I remember once, the science teacher asked us to observe snails. I was so excited that I went straight to the "little snail" without taking off my shoes, picked up a magnifying glass and began to observe. I looked at my head first and found two pairs of tentacles, one long and one short. According to the teacher, the snail's long tentacles can sense the changes of the surrounding environment, and its eyes are on the long tentacles, but it can only be seen clearly in the dark. Short tentacles are used to find food. I pay attention to putting some leaves on my wings. Sure enough, I saw the snail touch it three times with its short tentacles, which was very funny. I looked at my abdomen again and turned the snail upside down. I saw something glistening, but I didn't see anything. I checked the books on popular science, only to know that snails have abdominal feet in their abdomen, which can help snails crawl. I followed the snail's tail. At this time, I saw that there was mucus where it climbed. I quickly asked my mother where the mucus came from. What is its function? Mom said that mucus comes from the tail, and snails can make it faster by following the mucus. Putting down the magnifying glass, I went to the elementary school encyclopedia to see if I had more knowledge about snails.
Through observation, I learned many secrets of snails. Students can discover more secrets as long as they observe carefully!
Observe the composition of snails 4. It, a tenacious figure, carries a heavy shell and goes forward bravely. It is a snail.
Once, I saw a snail loitering by a pool, doing nothing. I thought, hey, what's this drooling hillbilly doing? Then I thought, forget it, it's always been like this anyway.
Suddenly, I saw another snail trying to climb up and leave a transparent footprint where it passed. I rushed to the corner with a shout, and I was fascinated by this "Hercules". He climbed up slowly. I crept a step forward and watched it quietly and carefully. I saw it climb up bit by bit with its stomach. I'm a little confused. Snails can neither fly away like birds nor rush up like cats. Why is it so difficult to climb up? If it were me, I should surrender and stay where I am. But I'm still climbing slowly. I thought that such a weak snail would never stop moving forward, but I didn't even dare to face the slightest setback. With this in mind, I want to do everything I didn't dare to do before.
What happened to that snail just now? So, I rushed to the corner with lightning speed. I saw the snail blocked by a big stone. I carefully took it off the wall, touched its indestructible shell and cold body, put it back on the wall and said to it, "You are safe, forever!" "
For many years, the tenacious appearance of snails has always inspired me to move forward. ...
Observing Snails Composition 5 In this semester's science class, science asked us to observe snails, so my father bought me two white jade snails with conch shells on their backs.
My white jade snail has two brown conchs, and there is a large white body at the bottom of the shell, which adds a bit of beauty to the shell. Their eyes are very small and grow on those thin tentacles, which can't be seen without careful observation. The body is big and soft.
They are always sleeping at ordinary times. One morning, when I went to observe them, one of them was sleeping under the leaves of Chinese cabbage, and the other was lying on the "throne" made of Chinese cabbage leaves I came home from school, and they kept this posture.
Once, my white jade snail was going to piss me off.
That time, after I changed the house for the white jade snail, I wanted to see how my white jade snail fell in love. So, I deliberately let them face to face, I thought they would climb together. As a result, after I finished eating, I immediately ran to its "door" and saw that moment. I'm angry that they actually ... compete for speed. Snails are not the slowest in the animal world. Faster than speed. It's like sending an umbrella after the rain-there's no need.
Oh, why did my snail climb the wall of the box again? Look, I can't catch you. Huh? Why are snails so hard to catch? So, with a questioning attitude, I went to consult my father. Dad said: "The snail's body is actually like a sucker. You just need to brush the snail's body with a brush and you can take it off. " I tried, ah! The snail was caught. Ah! Ah! With this method, I won't worry about not catching snails.
Snail is really a magical little animal. It's slow, but I still like it.
Observe the composition of snails 6 Recently, my family raised two snails, one large and one small. They always like climbing mountains, which makes me think snails prefer climbing mountains and sports.
God sent snails to the earth to test our patience. You see, it's not easy to let it stick its head out, alas. The only way is to soak it in water, and in a short time, it sticks out two tentacles. If I don't come out, I have no better way. Perhaps the snail is complacent in its shell: "Haha! Jun nai me what? I am General Snail. "
I fed the snail some leaves and some feed. The next morning, I was surprised to find that the snail's stool was a little black and green. What happened? Is the snail suffering from indigestion? I quickly checked the information and found out what color the snail's food was and what color the stool was.
This little snail has about 20,000 teeth. It just wolfs down its food. I put a biscuit in it, and then I went to the bathroom and came back. A big biscuit has been destroyed by it! Fortunately, snails don't bite. They are very docile. I like to put the snail in my hand and give it a "massage". But as soon as I hold it in my hand, I feel sucked, as if it were stuck to me.
I heard that the original liquid secreted by snails can be used for beauty. There are two ways: first, wash the snail and put it on your face to climb; The second is to put the snail on your hand and climb. A minute later, put your hands on your face. Does this really make you look beautiful? I haven't tried it yet.
Do you want snails to beautify you? I'd like to send you a snail! hahaha ......
There are some snails at home. I'm going to observe them.
Its head sticks out, and its four tentacles sway like four black "antennas", two of which have round black eyes. There are some small figures on my body, which are skin color and seem to be words. The whole snail seems to be a living "letter". And words are the content of the letter. The shell is like a maze, you have to go through it to get the letter. When the snail found the leaf, it tried to climb over it. Mucus will stay where it crawls, because mucus can speed up its crawling, not just ten centimeters a day. When crawling on the glass, you can see that the edge of the snail's abdomen is somewhat curved.
Snails are used to living in loose, damp and dark environments, such as cracks in stones and soil ... They like to eat fresh cabbage leaves, delicious lettuce leaves and even crispy bread. However, if you give it chocolate, the snail will definitely say something that is too quiet to hear: "I won't eat disgusting chocolate if I die!" " "How picky!
Once, I played hide-and-seek with snails. I'll hide in my mother's closet first, and then count: one, two, three. After a long time, I got a little impatient, so I came out to look for snails. Under the bed, behind the door, on the wall … but there is nothing. Suddenly, an antenna stuck out of the snail's shell, as if to say, "You can't beat me, there's nothing you can do!" " I was so angry that I threw the snail into the water. After a while, the snail struggled desperately because it didn't adapt to the environment in the water, as if to say, "Are you going to drown me? You are so wicked. "
Snails are pests to farmers and treasures to scientists. It is said that snail droppings are still high in protein!
Observing the composition of snails 8 Among the small animals, I think snails are the cutest. Snail is a mollusk. It has a very hard spiral shell with two pairs of antennae on its head, one of which has long eyes at the top. When the head and feet are crawling on the ground, two pairs of tentacles always move slowly. People call it a snail, because its body usually shrinks in a shell and its head has tentacles when it crawls. Snails have a small mouth, but they can hold 1 10,000 to 20,000 teeth, so they are also called "animals with the most teeth".
They like to hang out at night and don't like the sun. They are usually on smooth stones to deal with their natural enemies-fireflies. Because snails hold on to smooth stones more tightly. Once it falls from the stone, fireflies no longer regard it as their prey.
Although snails retract their heads into their shells, some of their meat is still exposed. If you encounter a careless snail, fireflies will seize the opportunity decisively, and quickly inject toxins and solution into the snail with their tentacles, so that the snail becomes numb and unable to move, and then slowly becomes "snail porridge" under the action of the solution, and the snail shell falls off, and the "snail porridge" on the stone becomes a delicious food for fireflies.
Compared with fireflies, snails eat much more vegetarian food. Snails mainly eat fruits and vegetables and fruits with rich stems, leaves and juices. There are many kinds of snails. There are 40,000 kinds of snails in the world. Some are beneficial, some are harmful, and they are pests to farmers because they eat crops. For pharmacologists, snails are treasures and can be used to make many medicines.
This is the mollusk I know-snail.
My little snail has been following me for more than half a year, and it has become my inseparable friend. I love my little snail.
Today, the science teacher asked us to catch some snails to observe. So my mother and I went to the park to look for it carefully. Finally, we found some small snails in a damp and dark corner. I regard them as treasures, carefully put them away and put them in the bottle.
Snail is a lovely little animal. Its eyes are very small, just like a small chocolate bean. A snail carries a heavy shell on its back, just like its "small house". The book says that whenever it is in danger, it can safely hide in its "small house".
It is said that snails leave a long and thin line when they crawl. Is it true?/You don't say. I decided to do an experiment. I put a small snail on the table and put some leaves in front of it. The little snail moved. It slowly climbed to the other end of the leaf, leaving a trail. It's a slender line. I touched it and it was wet. By consulting the information, I know that this is mucus discharged by snails, which is used to protect the abdomen and help snails crawl.
What do snails like best? I did another experiment. I put lettuce leaves, biscuits and apples around the snail. And stare at its movements. I found that the snail's first target was a vegetable leaf. I saw it climb to the middle of the vegetable leaf and chew a small hole, and then chew the edge of the small hole with its small mouth. Although the snail's mouth is small, it eats quickly and soon gnaws a big hole. However, it didn't look at cookies and apples. I see, so the snail's favorite food is vegetable leaves.
Through observation, I know many secrets of snails. Snails are really cute and interesting little animals.
Many people have kittens, puppies or birds at home, but my family has two small animals-the snail, which can neither sing nor get close.
The big snail is really interesting. There are four thin tentacles on its small head, and I can't tell which two tentacles have eyes. But as long as you gently touch the snail's tentacles, it will sensitively retract its whole body into its shell. Don't worry, wait patiently for three or two minutes, and the big snail will carefully stick its head out and show its indifference. From the snail's head to its neck, Jane really looks like an isosceles trapezoid because its neck is twice as thick as its head! Under the neck is a huge shell. The snail shell is brown, not very hard, with a low cone and a spiral on it. The most interesting part of a snail is its foot. Its feet are flat, and the soles of its feet are white, in sharp contrast to its dark green figure. Whenever a big snail crawls, its feet move forward immediately, as if it were carrying out a "spacewalk". It is really interesting!
My two snails sleep late all day in wooden boxes specially made for them, so they both gain weight. Look at the mismatch between its small head and its thick neck! I'm really worried that one day they will be too fat to get into the shell. ...
Whenever I see these two big French snails, I always think of the song Snails and Orioles that my grandmother taught me to sing. I really hope my snail can know his "shortcomings" quickly and stop being lazy. Thinking of this, I sang unconsciously, and the two snails seemed to be listening carefully! "The snail carries that heavy shell and climbs up step by step ..."