organ systems

Integumentary

Protection from environmental hazards; temperature control

Skeletal

Support, protection of soft tissues; mineral storage; blood formation

Muscular

Locomotion, support, heat production

Nervous

Directing immediate responses to stimuli, usually by coordinating the activities of other organ systems

Endocrine

Directing long-term changes in the activities of other organ systems

Cardiovascular

Internal transport of cells and dissolved materials, including nutrients, wastes, and gases

Lymphoid

Defense against infection and disease

Respiratory

Delivery of air to sites where gas exchange can occur between the air and circulating blood

Digestive

Processing of food and absorption of organic nutrients, minerals, vitamins, and water

Urinaru

Elimination of excess water, salts, and waste products; control of pH

Reproductive

Production of sex cells and hormones