Organ Systems

Organ systems are a collection of organs working together to carry out a function.The digestive system consists of many organs including salivary glands, the stomach, pancreas, the liver, duodenum and ileum. Its function is to break up food into small molecules and absorb small molecules into the blood and lymphatic system.The circulatory system includes the heart, arteries, veins and capillaries. Its function is the mass transport of substances and blood cells around the body.The respiratory system includes the lungs, trachea, bronchi and bronchioles. Its function is to exchange gases such as carbon dioxide and oxygen with the environment.The endocrine system consists of glands that secrete hormones into the blood. Hormones carry out cell signalling.The excretory system includes the kidneys and functions to remove excess water and metabolic waste from the body.The musculoskeletal system protects vital organs and moves and supports the organism.The reproductive system includes the ovaries and testes and other organs that work together to carry out sexual reproduction.The lymphatic system is important in immunity and the transport of lipids.