Answer:

1. C. Femur
2. B. Ribs
3. C. Skull
4. A. The bones support the body and protect the internal organs.
5. B. voluntary muscles

Explanation:

1. The kneecap slides along a groove in the femur as the knee bends. It is held in place by a ligament at the bottom and a tendon on top. Those connect to the femur and tibia. Sometimes, due to numerous complications, the kneecap comes out of its groove and becomes dislocated.
2. The ribs form a cage that shelters the heart and lungs, and the pelvis helps protect the bladder, part of the intestines, and in women, the reproductive organs.
3. The skull has evolved features that protect the brain in several ways.
4. Bones also protect the body's organs. ... The spinal cord, a pathway for messages between the brain and the body, is protected by the backbone, or spinal column. The ribs form a cage that shelters the heart and lungs, and the pelvis helps protect the bladder, part of the intestines, and in women, the reproductive organs.
5. Skeletal muscle is attached by cord-like tendons to bone, such as in the legs, arms, and face. ... These muscles help hold the skeleton together, give the body shape, and help it with everyday movements (known as voluntary muscles because you can control their movement).