Systems of the Body and their Necessary Life Functions

Integumentary System

forms the external body covering that protects the deeper tissues of the body

Skeletal System

protects and supports organs. attach muscles, and provide for the blood cell formation

Muscular System

allows movement, maintains posture, and produces heat

Nervous System

a fast acting control system that responds to internal and external changes, activating the appropriate muscles and glands

Endocrine system

secretes hormones that regulate the processes of the body

Cardiovascular system

the heart and blood vessels work together to transport blood containing oxygen, nutrients, and other substances, throughout the body

Lymphatic and immune systems

returns excess fluid to blood, removes debris, and houses cells of the immune system

Respiratory system

keeps blood supplied with oxygen and removes carbon dioxide

Digestive system

breaks down food into molecules that can be absorbed into the body, stores and eliminates wastes

Urinary System

eliminates nitrogenous wastes, and regulates water and ion balance

Male and female reproductive systems

produces sex hormones and gametes for the production of offspring, female provides support for the developing fetus

Maintaining Boundaries

allows an organism to maintain separate internal and external environments or separate internal chemical environments

Movement

allows the organism to travel through the environment, and allows transport of molecules within the organism

Responsiveness, excitability

the ability to detect changes in the internal or external environment and respond to them

Digestion

the process of breaking down food into molecules that are usable by the body

Metabolism

includes all chemical reactions that occur in the body

Excretion

is the process of removing wastes

Reproduction

is the process of producing more cells or organisms

Growth

is an increase in size in body parts or the whole organism