Skeletal System
The internal framework of the body. 206 bones providing structure and protection.
Nervous System
The master control network. Transmits signals between the brain and the rest of the body.
Circulatory System
The transport highway. Moves blood, nutrients, and oxygen to and from cells.
Respiratory System
Gas exchange mechanism. Harvests oxygen and expels carbon dioxide.
Digestive System
Energy processing plant. Breaks down food into absorbable nutrients.
Muscular System
The engine of movement. Tissues that contract to produce force and motion.