Question

1.DIFFERENTIATE BETWEEN EXOSKELETON AND ENDOSKELETON

Q2. EXPLAIN MOVEMENT IN SNAKE AND SNAIL

Q3.WHAT ARE THE FUNCTIONS OF RIBCAGE?

Answer 1

Answer:

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Answer 2

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The Endoskeleton of an animal is present inside the body, which is also known as the internal skeleton. Meanwhile, the exoskeleton of an animal is present outside the body, which is also known as the external skeleton. The exoskeleton is made up of hard bones and malleable cartilage.

Tiny bristles on the underside of the body help in gripping the ground. Snails move with the help of a muscular foot. Fish swim by forming loops alternately on two sides of the body. Snakes slither on the ground by looping sideways. A large number of bones and associated muscles push the body forward.

The rib cage protects the organs in the thoracic cavity, assists in respiration, and provides support for the upper extremities. During inspiration the ribs are elevated, and during expiration the ribs are depressed.