Fill in the blanks:

a. Joints of the bones help in the ________ of the body.

b. A combination of bones and cartilages forms the ________ of the body.

c. The bones at the elbow are joined by a ______ joint.

d. The contradiction of ___________ pulls the bones during movement.

Indicate true (T) and false (F) among the following sentences:

a. The movement and locomotion of all animals is exactly the same. ( )

b. The cartilages are harder than bones. ( )

c. The finger bones do not have joints. ( )

d. The fore arm has two bones. ( )

e. Cockroaches have an outer skeleton. ( )

Match the items in Column I with one or more items of Column II:

Answer the following:

a. What is a ball and socket joint?

b. Which of the skull bones are movable?

c. Why can our elbow not move backwards?