Question

compare the skeletal system of human and birds​

Answer 1

Explanation:

To fly, birds need a rigid support system, hence, birds will have fewer bones than humans. Compare the 29 bones in a human's forelimb to 11 in a pigeon. To fly, wings must be supported by a larger mass of muscles.

Answer 2

Unlike human bones, birds have a lot more empty space inside their bones. Bird and bat bones also look smaller and more delicate than human bones.

• The avian (bird) skeleton has many features that resemble the human skeleton, and the majority of the bones are the same, they are only shaped different.
• The arm bones of the human consist of the humerus, the radius and the ulna. These bones are also found in the bird.

• The leg consists of a long femur which attaches to the pelvis and then two bones of the lower leg. In the bird, these two bones: the tibia and fibula are fused together.

• The head of both birds and humans is protected by a large cranium. The upper jaw of the human, and  the upper beak of the bird is composed of a bone called the maxilla.
• The lower jaw, and lower beak is  composed of a bone called the mandible.
• The main difference between the human and bird skeleton is that the bird's skeleton is adapted for  flight. The bones of a bird are hollow which makes the skeleton lighter.

• The other differences between the bird and human skeleton are very apparent in the pectoral girdle,  which is the place where the forelimbs attach to the spine. The bird's forelimbs are wings and must  have a strong support system. The collarbone of the bird is fused to form the furculum, or wishbone.

• The "shoulderblade" of the human is actually a bone called the scapula, birds have a scapula and they  also have an additional shoulder blade bone called the corocoid.

• Another obvious difference between the human and bird skeleton is the shape and size of the sternum.

• A bird's sternum is large and positioned under the body - flight muscles attach to this bone. The ridge of  the bird's sternum is called a keel. The ribs are attached to the spine and to the sternum.

hope it helps !!