By movement we usually mean displacement from one place to another. In case of animals movement means simply moving body or limb - that is, change their position. Locomotion means movement of animals from one place to other.
Earthworms have liquid skeletons. They have liquid trapped in spaces inside the body. The muscles squeeze against the liquid. This keeps the body firm. The earthworm first extends the front part of its body, keeping the rear part fixed to the ground. Next, it fixes the front part and shortens it, thus pulling the rear end forward.It has a long cylindrical body made up of many rings or segments joined end to end. It carries out such expansion and contraction of muscles repeatedly to move forward. There are two types of muscles in an earthworm's body - circular and longitudinal muscles. When circular muscles contract, the segments become long and thin. When longitudinal muscles contract, the segments become short and thick.
To move, first the earthworm contracts the circular muscles of the front segments. As a result, the front part of the body becomes long and moves a little ahead by withdrawing the bristles from the ground. Then, the longitudinal muscles of the front part of the earthworm contract and segments become short and thick. The bristles of the front part now grip the ground and the segments in the rear part of the earthworm become thin and long due to contraction of circular muscles.
Which of these help caterpillar and earthworm to move? | |||
Right Option : A | |||
View Explanation |
The _________________ in earthworms help to get a good grip on the ground | |||
Right Option : D | |||
View Explanation |
Which of these help caterpillar and earthworm to move? | |||
Right Option : A | |||
View Explanation |
My experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
About Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
A marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
It was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
I have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Being a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
My experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
It has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
It was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Abhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.