Organs: Skin, hair, sweat glands, nails.

*largest organ, first level of protection

Functions: Protects against environmental hazards, helps regulate body temperature, provides sensory information

Organs: bones, cartilages, associated ligaments, bone marrow

*regulate immune system

Functions: Provides movement, protection and support for other tissues, and generates heat that maintains body temperature.

Organs: skeletal muscles, associated tendons and aponeuroses (tendious sheets)

Functions: provides movent and protection and support for other tissues, generates heat that maintains body temperature

Organs: brain, spinal cord, peripheral nerves,

sense organs: tounge, eyes, ears, etc.

Functions: directs immediate responses to stimuli->brain, coordinates or moderates activities of other organ systems, provides and interprets sensory information about external conditions

* sensing and communicating

Organs: heart, blood, blood vessels

Functions: distributes blood cells, water, and dissolved materials, including nutrients, waste products, oxygen, and carbon dioxide

distributes heat and assists in control of body temperature

*transportation

Organs: pituitary gland, thyroid gland, pancreas, adrenal glands, gonads (testes and ovaries), endocrine tissues in other systems

Functions: directs long term changes in the activities of other organ systems, adjusts metabolic activity and energy used by the body, controls many structural and functional changes during development

Organs: spleen, thymus, lymphatic vessels, lymph nodes, tonsils

*internal protection

Functions: defends against infection and disease, returns tissue fluids to the blood stream

Organs: teeth, tounge, pharynx, esophogus, stomach, small and large intestine, liver, gallbladder, pancreas

Functions: processes and digests food, absorbs and conserves water, absorbs nutrients (ions, water, and the breakdown products of dietary sugars, proteins, and fats), stores energy reserves

*solid waste

Organs: nasal cavities, sinuses, larynx, trachea, bronchi, lungs, alveoli

Functions: delivers air to the alveoli (sites in lungs where gas exchange occurs), provides oxygen to bloodstreem, removes carbon dioxide from blood streem, produces sounds for communication

Organs: kidneys, ureters, urinary bladder, urethra

Functions: excretes waste products from the blood, controls water balance by regulating volume of the urine produced, stores urine prior to voluntary elimination, regulates blood ion concentrations and pH

*liquid waste

Organs: ovaries, uterine tubes, uterus, vagina, labia, clitoris, mammary glands, testes, penis

Functions: produces female sex cells (oocytes) and hormones, supports develping embryo from conception to delivery, provides milk to nourish newborn infants

*reproduces!