ORGANS
Organs are grouped together into organ systems. Examples of organ systems include the circulatory system and the digestive system
BIOSPHERE
Biosphere 2. Currently, the only known biosphere in the universe is Earth's biosphere, and it is considered Biosphere 1. However, humans have created artificial biospheres, including Biosphere 2. Biosphere 2 was a laboratory built in Oracle, Arizona, to do controlled studies.
ecosystem andconsists of different trees.
Forest –This ecosystem consists of dense trees and an abundance of plant species. Desert – This ecosystem is marked by extremely low rainfall, not necessarily a hot climate. Grassland – This ecosystem includes an almost continuous cover of grasses but not many taller plants
Brain
The nervous systemThe nervous system has two main parts: The central nervous system is made up of the brain and spinal cord. The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.
