Final answer:
The human body has 206 bones in adulthood, which are categorized based on their shape and related functions. Bones contain living tissue and joints with cartilage for movement.
Step-by-step explanation:
The adult human body has 206 bones. The correct answer to the question is A. 206. These bones are divided into five categories based on their shapes, and each shape has a distinct function related to the body's basic framework and movement capacities. Besides providing structure, bones contain living tissues, including cartilage at the joints, which creates smooth surfaces for the movement of bones.
It's important to note that the number of bones in the body can vary during a person’s lifetime; a baby is born with approximately 270 bones, some of which fuse together during growth to form the 206 bones in the adult human skeleton. Moreover, each bone, with the exception of the hyoid bone in the neck, is connected to at least one other bone at joints that are either designed for movement or stability.