Question

1 st to all Roman answer​

Answer 1

1-a- iii

 b- i

2- a-Examples of this are found in the hip, where the round head of the femur (ball) rests in the cup-like acetabulum (socket) of the pelvis; and in the shoulder joint, where the rounded upper extremity of the humerus (ball) rests in the cup-like glenoid fossa (socket) of the shoulder blade.

   b- The ribs are the bony framework of the thoracic cavity. There are twelve pairs of ribs.

3-a- (Cannot be answered here)

  b- Fixed joints permit stability to certain areas of the body, although they do not move. Examples of fixed joints include the joints between the bones in the skull and the joint where the radius and ulna bones meet in the lower arm.