The 11 organ systems and their general functions

INTEGUMENTARY SYSTEM

• Protects the body from the external environment

• Produces vitamin D

• Retains water

• Regulates body temperature

SKELETAL SYSTEM

• Supports the body

• Protects internal organs

• Provides leverage for movement

• Produces blood cells

• Stores calcium salts

MUSCULAR SYSTEM

• Produces movement

• Controls body openings

• Generates heat

NERVOUS SYSTEM

• Regulates body functions

• Provides for sensation, movement, automatic functions, and higher mental functions via nerve impulses

ENDOCRINE SYSTEM

• Regulates body functions

• Regulates the functions of muscles, glands, and other tissues through the secretion of chemicals called hormones

CARDIOVASCULAR SYSTEM

• Pumps and delivers oxygen-poor blood to the lungs and oxygen-rich blood to the tissues

• Removes wastes from the tissues

• Transports cells, nutrients, and other substances

LYMPHATIC SYSTEM

• Returns excess tissue fluid to the cardiovascular system

• Provides immunity (protection against disease)

RESPIRATORY SYSTEM

• Delivers oxygen to the blood

• Removes carbon dioxide from the body

• Maintains the acid-base balance of the blood

DIGESTIVE SYSTEM

• Digests food

• Absorbs nutrients into the blood

• Removes food waste

• Maintains fluid, electrolyte, and acid-base balance

URINARY SYSTEM

• Removes metabolic wastes from the blood

• Maintains fluid, electrolyte, and acid-base balance

• Stimulates blood cell production

REPRODUCTIVE SYSTEM

REPRODUCTIVE SYSTEM: MALE

• Produces and transports sperm

• Secretes hormones

• Sexual function

REPRODUCTIVE SYSTEM: FEMALE

• Produces and transports oocytes (eggs)

• Site of fetal development, fetal nourishment, childbirth, and lactation

• Secretes hormones

• Sexual function