nervous system		enables the body to move, moves food through the digestive system and keeps the heart beating
excretory system		makes parts of the body move by contracting and relaxing
organ systems		detects and interprests information from the environment outside the body and from within the body
connective tissue		A group of similair cells that perform the same function
organs		covers the surface of your body both inside and outside
epithial tissue		The basic unit of structure and function in aliving thing
cell		protects teh body, keeps water inside the body, and helps regulate body temparture
nerve tissue		A structure that is composed of different kinds of tissue.
nucleus		Takes food into the body, breaks food down, and absorbs the digested materials
circulatory system		Forms the outside boundary of the cell
homeostasis		process by which the bodies internal environments is kept stable.
reproductive system		carries messages back and forth between the brain and every other part of the body.
cell membrane		the area between the cell membrane and the nucleus. it is a clear jelly like substance.
muscle tissue		fights disease
immune system		supports and protects the body
cytoplasm		controls many body processes by means of chemicals
respiratory system		takes oxygen into the body and eliminated carbon dioxide
endocrine system		provides support for your body and connects all its parts
skin		carries materials to the body cels; carries waste away from body cells, helps fight disease
skeletal system		produces sex cells that unite to create offspring
tissues		removes waste
digestive system		it is located inside the cell and it is the control center that directs the cell's activities.
muscular system		A group of organs that work together to perform a major function.