Functions of the Digestive System The functions of the digestive system are: Ingestion. Food must be placed into the mouth before it can be acted on; this is an active, voluntary process called ingestion. Propulsion. If foods are to be processed by more than one digestive organ, they must be propelled from...

Functions of the Integumentary System The functions of the integumentary system are: Protection. The skin protects deeper tissues from mechanical damage (bumps), chemical damage (acids and bases), ultraviolet radiation (damaging effects of sunlight), bacterial damage, thermal damage (heat or cold), and desiccation...

Functions of the Blood Blood is unique; it is the only fluid tissue in the body. 1. Carrier of gases, nutrients, and waste products. Oxygen enters blood in the lungsand is transported to cells. Carbon dioxide, produced by cells, is transported in the blood to the lungs, from which it is expelled....