The correct answer is A. 206.
The human skeleton is made up of 206 bones. These bones are divided into two main groups: the axial skeleton and the appendicular skeleton. The axial skeleton includes the skull, the spine, and the ribs. The appendicular skeleton includes the arms, the legs, and the hands and feet.
The bones in the human body are constantly being remodeled. This process of remodeling is necessary to maintain the strength and health of the bones. The bones are also constantly being replaced. New bone is formed to replace old bone that has been lost due to injury or disease.
The bones in the human body are very important. They provide support for the body, protect the organs, and allow us to move. The bones are also involved in the production of red blood cells and white blood cells.
Here is a brief description of each of the options:
- Option A: 206. This is the correct answer. The human skeleton is made up of 206 bones.
- Option B: 103. This is incorrect. The human skeleton is made up of 206 bones, not 103 bones.
- Option C: 309. This is incorrect. The human skeleton is made up of 206 bones, not 309 bones.
- Option D: 412. This is incorrect. The human skeleton is made up of 206 bones, not 412 bones.