There are many fish species, and they are all unique, but they share the same basic anatomy. This includes the head, body, ...

The feet support the human body when standing, walking, running, and more. They are complex structures with 26 bones. Learn more about foot bones and foot anatomy here.

Skeletal muscle is the type of muscle that controls movement. Problems with these muscles can be minor, life-threatening, or ongoing problems that make it hard to perform basic daily activities.