Life on Earth: At a Glance

Homeostasis: Negative feedback tends to maintain constant internal conditions.
Positive feedback events are self-limiting.

The Organization of the Animal Body
Animal tissues are composed of similar cells that perform a specific function.
Organs include two or more interacting tissue types.
Organ systems consist of two or more interacting organs.; Positive feedback events are self-limiting.

The Organization of the Animal Body
Animal tissues are composed of similar cells that perform a specific function.
Organs include two or more interacting tissue types.
Organ systems consist of two or more interacting organs.
The Organization of the Animal Body: Animal tissues are composed of similar cells that perform a specific function.
Organs include two or more interacting tissue types.
Organ systems consist of two or more interacting organs.; Organs include two or more interacting tissue types.
Organ systems consist of two or more interacting organs.; Organ systems consist of two or more interacting organs.

Last Update - July 25, 1997