Human Body Organization

A system is a group of organs that work together to perform a specific function in the body.

Homeostasis is the tendency of the body to maintain stable internal conditions despite changes in the external environment.

A tissue is a group of similar cells that work together to perform a specific function.

The brain belongs to the nervous system.

The digestive system includes the mouth, esophagus, stomach, and intestines.

The spinal cord transmits messages between the brain and the rest of the body.

Nerves carry signals to and from different parts of the body, allowing communication between the brain and organs.

An organ is a structure made up of different types of tissues that work together to perform a specific function.

The endocrine system works with the nervous system to regulate bodily functions.

The circulatory system transports blood, nutrients, gases, and waste products throughout the body.