Necessary Life Functions

The 8 necessary life functions

maintain their boundaries, move, respond to environmental changes, take in and digest nutrients, carry out metabolism, dispose of wastes, reproduce themselves, and grow.

Maintaining boundaries

So the insides are separated from the outside

Movement

both the body and internal parts can move

Responsiveness

the ability to sense a change in environment and respond to it.

Digestion

breaking down food and taking in nutrients

Metabolism

All the chemical reactions that happen in the body cells

Excretion (waste)

removing waste from the body made by metabolism and digestion

Reproduction

Producing offspring on both cellular and organismal level

Growth

The process of increasing in size or number

Survival Needs

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

Nutrients

give the body energy and materials for cells

Oxygen

helps release energy from food

water

60-80% of the body weight and is necessary for chemical reactions

Appropriate temperature

98.6 degrees

Atmospheric pressure

for gas exchange