Unit 1 Anatomy Life functions

Maintaining Boundaries

cells and organisms must keep their internal and external environments separate. This helps regulate water rand nutrients.

Movement

activities promoted by the muscular system and movement of substances through the body.

Responsiveness

the ability to sense changes in the environment and respond to them

Digestion

the ability to break down food into simple molecules that can be absorbed and used by the body

Metabolism

all chemical reactions in the body these processes include catabolic processes which break down substances and anabolic processes which build up new larger molecules.

Excretion

removal of waste products produced by metabolism and digestion

Reproduction

production of offspring

Growth

Increase in the size of a body part or organism through cell division

Survival needs

Nutrients, oxygen, water, normal body temperature, appropriate atmospheric pressure

Water

most abundant chemical in the body needed for chemical reactions in the body

Normal body temp

Needed for proper enzyme function and metabolic reactions of proteins

Nutrients

needed for energy and cell growth

oxygen

required for metabolism (cellular respiration)

Appropriate Atmospheric pressure

required to breathe