Explore the intricate structures and functions of the human body, from cells to organ systems.
Your body is organized into systems, each with a special mission:
Moves blood, oxygen, and nutrients around your body.
Brings in oxygen and removes carbon dioxide through breathing.
Breaks down food so your body can use the nutrients.
Sends messages to and from your brain, controlling your thoughts and actions.
Bones and muscles work together to support your body and help you move.
If one system fails, others are affected. For example, if your lungs can't get oxygen, your muscles can't work properly.
The adult human body has 206 bones and over 600 muscles!
Your circulatory and respiratory systems work together when you run.
Your digestive and nervous systems interact when you feel hungry.
Body systems are groups of organs that work together to keep you alive and healthy.