circulatory system Flashcards
importance of the circulatory system
the main transport system in the body. nutrients to cells, waste from cells, oxygen to cells
3 main components of the circulatory sytem
heart, blood vessels, blood
plasma
blood volume, pH, transports fluids
red blood cells
transport O2 and CO2
hemoglobin
a protein that binds O2 and transports it to cells
white blood cells
destroys invaders by phagocytosis
platelets
blood clotting
arteries
muscular thick walled high pressure blood vessels carrying oxygenated blood away from the heart to the body
veins
thin walled low pressure blood vessels carrying deoxygenated blood from the body back to the heart
capillaries
single blood cell vessels connecting arteries and veins. fluid and gas exchange, diffusion, permeable walls