Human Body Organism

• Forms the external body covering (skin)
• protects deeper tissues from injury synthesizes vitamin D site of cutaneous

• Protects and supports body organs: 
• Provides a framework the muscles use to cause movement: blood cell are formed within bones: store minerals

Allows manipulation of the enviroment locomotion and facial expression; maintains posture; produces heat

Pick up fluid leaked from blood vessels and returns it to blood; disposes 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

Keeps blood constantly supplied with oxygen and removes carbon dioxide; the gaseous exchanges occur though the walls of the air sacs of the lungs

breaks down food into absorbable units that enter the blood for distribution to body cells; indigestible foodstuff are eliminated as feces

fast-acting control system of the body responds to internal and external changes by activating appropriate muscles and glands

Glands secrete hormones that regulate processes such as growth reproduction and nurtrient use (metabolism) by body cells

Blood vessels transport blood, which carries oxygen, carbon dioxide, nutrients wastes, etc.; the heart pumps blood

Eliminates nitrogenous wastes from the body; regulates water, electrolyte and acid-base balance of the blood

Overall function is production of offspring. testes produce sperm and male sex hormones;ducts and glands aid in delivery of sperm to the female reproductive tract. Ovaries produce eggs and females sex homes; remaining structures serve as sites for fertilization and development of the fetus. mammary glands of female breasts produce milk to nourish the newborn