Please tell me answers for this questions. Write about movement of earthworm. How does snail move? How does cockroach move? Write parts of a skeleton.
Answers
Explanation:
1) An earthworm moves using circular and longitudinal muscles, as well as bristles called setae. The earthworm can push the setae out of its body to grab the soil around it. To move forward, the worm uses its setae to anchor the front of its body and contracts the longitudinal muscles to shorten its body.
2) Land snails move by gliding along on their muscular foot, which is lubricated with mucus and covered with epithelial cilia. This motion is powered by succeeding waves of muscular contractions that move down the ventral of the foot.
3)They undergo two types of locomotion – walking and flying. A cockroach has 3 pairs of legs which help it to walk on the ground. The two pairs of wings attached to the breast muscles help the cockroach to fly.
4) The 80 bones of the axial skeleton form the vertical axis of the body. They include the bones of the head, vertebral column, ribs and breastbone or sternum. The appendicular skeleton consists of 126 bones and includes the free appendages and their attachments to the axial skeleton.
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