Organ Systems cont.

7) Lymphatic System- picks up fluid leaked from blood vessels and returns it to the blood, disposed of debris in the lymphatic stream, houses white blood cells involved in immunity, the immune response mounts the attack against foreign substances within the body.
8) Respiratory system- keeps blood supplied with oxygen and removes carbon dioxide, gas exchanges occur in the walls of the air sacs of the lungs
9) Digestive system- breaks down food ink absorbable units that enter the blood for distribution to body cells, in digestive food parts are eliminated as feces
10) Urinary system- eliminates nitrogenous wastes from the body, regulates water, electrolyte, and acid base balance of the blood.
11) Reproductive System- overall function is production of offering. Testes produce sperm and male sex hormones, ducts and gland aid in delivery of sperm to the female reproductive tract. Ovaries produce eggs and female sex hormones. Remaining structures serve as sites for fertilization and development of the fetus. Mammary glands of female breasts produce milk to nourish the newborn.