Sum of all chemical reactions that occurs in the body. 

Ex: Catbolism is the breakdown of complex subtances into simpler substances such as food protein entering the digestive tract.

Anabolism is the use of the amino acids to build new proteins from simple substances to complex substnaces for use with building body structures.

Body's ability to detect and respond to changes.

Ex: ^ in body temp. during fever represents change in internal environment, while hearing a sound is a change in the external environment

Includes motion of the whole body, individual organs, single cells and even tiny structures within cells.

Ex: releas of bile to breakdown fat during digestion

increase in body size that results from an increase in the size of existing cells, increase in number of cells or both. 

Ex: A bone grows adn expands when mineral deposits accumulate between bone cells, causing bone to grow in length and width.

developement of a cell from an unspecialized  to a specialized state.

Ex: Red and White blood cells growing from red bone marrow

Refers either to  the formation of new cells for tissue growth or the production of a new individual

Ex: Fertilization of sperm cell