A collection of tissues that have an identifiable structure and that perform specific functions
Body systems
Integumentary
Skeletal
Muscular
Nervous
Circulatory
Immune/Lymphatic
Endocrine
Reproductive
Respiratory
Digestive
Excretory
Integumentary system
Largest organ of the body, first line of defense against infection and water loss; regulates temperature, perceives sensation, produces vitamin D; and has absorption capabilities
Skeletal system
Forms the physical foundation of the body; consists of the bones and movable and immovable joints
Muscular system
Covers, shapes, and supports the skeletal tissue; also contracts and moves various parts of the body; consists of muscles
Nervous system
Carries messages through the central nervous system, controlling and coordinating all bodily functions
Circulatory system
Controls the steady delivery of the blood through the body; works with the lymphatic channels
Immune/Lymphatic system
Protects the body from disease by developing resistances and destroying disease-causing toxins, foreign material, and bacteria
Endocrine system
Affects growth, development, sexual activities, and normal regulatory processes of the body; consists of specialized glands
Reproductive system
Performs the function of producing children and passing on our genetics from one generation to another; differentiates between the sexes
Respiratory system
Enables breathing, supplies the body with oxygen, and eliminates carbon dioxide as a waste product
Digestive system
Breaks down food into smaller and smaller particles to absorb nutrients or for excretion
