Forms the external body covering; Protects the deeper tissue from injury; Synthesizes vitamin D; location of cutaneous (pain, pressure, etc.) receptors and sweat and oil gland. Excretes salts and urea. Regulates temperature.
Protects and supports body organs; provides muscle attachment for movement; site of blood cell formation; stores minerals.
Produces movement; maintains posture and produces heat.
Fast-acting control system; responds to internal and external change; Activates muscles and glands
Secretes regulatory hormones; Growth; reproduction; metabolism
Transport materials in body via blood pumped by heart; oxygen; carbon dioxide; Nutrients; Wastes
Returns fluids to blood vessels; cleanes the blood; involved in immunity
Keeps blood supplied with oxygen; removes carbon dioxide