Endocrine system
Regulation of body activities through hormones
Reproductive system
Reproduction of individuals, sex hormones
Lymphatic system
Returns tissue fluid to blood, produces immunity
Digestive system
Physical and chemical breakdown of food
Respiratory system
Supplies oxygen and eliminates carbon dioxide
Muscular system
Movement
Skeletal system
Production of blood cells, support of the body
Cardiovascular system
Distribution of materials to cells, waste collection
Integumentary system
Protection, sensation, regulation of temperature
Urinary system
Regulation of blood composition, removal of waste
Nervous system
Regulation of body activities by nerve impulses