11 Organ Systems

Integumentary

outer covering and protection from the environment (the body's first line of defense). Ex: skin

Skeletal

provides a framework for the skeletal muscles to use to create movement Ex: bones

Muscular

movement and manipulation. Ex: muscles

Nervous

allows the body to respond to stimuli from outside (light, sound, or changes in temperature) and inside (decreases in oxygen or stretching of tissue) the body. Ex: brain

Endocrine

to help maintain a steady state in the body by producing and secreting hormones (produced by endocrine glands) Ex: pituitary, ovaries, & testes

Cardiovascular

transport system for blood which carries oxygen, nutrients, hormones, etc. Ex: heart

Lymphatic

to collect and return interstitial fluid (between cells and tissues leaked from the blood), including plasma proteins, to the blood, and thus help maintain fluid balance. Ex: spleen

Respiratory

exchanges oxygen from the air for the waste product carbon dioxide, which is eliminated from the body. Ex: nose and lungs

Digestive

breaks down food, absorbs nutrients (which are distributed throughout the body through the bloodstream), and excretes solid waste. Ex: mouth and stomach

Urinary

regulates salt, and water content of the blood, blood pH. Ex: kidneys

Reproductive

produces sex cells, allows transfer of sex cells and fertilization to occur, permits development and birth of offspring, nourishes offspring, and produces sex hormones. Ex: mammary glands, vagina, prostate, & penis