BIOA01H3 Chapter Notes - Chapter 49: Embolus, Elastin, Autoregulation

• School: UTSC
• Department: Biological Sciences
• Course: BIOA01H3
• Professor: Mary Olaveson

Document Summary

Circulatory system consists of muscular pump (heart), a fluid (blood) and series of blood vessels; collectively known as. Function: to transport things around body: heat, hormones, respiratory gases, blood cells, platelets and elements of immune system. Single-celled organisms do not have circulatory system; their exchange of substances occurs in a direct manner. Larger animals need to be able to support the metabolism of the cells by delivering the nutrients to them and taking wastes from them with the circulatory systems. Extracellular fluid surrounds each cell and provides the oxygen, fuel and essential molecules that the cells need; the waste products also go into the extracellular fluid. Two types of systems: open circulatory system: extracellular fluid continuous with the fluid in blood vessels. Vessels of these animals empty their fluid directly into the tissues: closed circulatory system: The circulating blood and fluid are contained in continuous systems of vessels.