circulatory system Flashcards
what does the right ventricle do
pumps deoxygenated blood to the lungs to get oxygen and returns to the heart
what does the left ventricle do
pumps oxygenated blood around the body
what do valves do
prevent backflow of blood
what are the 3 different types of blood vessel
arteries
capillaries
veins
what do arteries do
carry blood away from the heart
what do capillaries do
exchange of materials at tissues
what do veins do
carry blood to the heart
what do features do capillaries have
1 cell thick so short diffusion pathway
permeable walls for substances to diffuse in and out
how to work out rate of blood flow
volume of blood/minutes
features of a red blood cell
carry oxygen to the body
don’t have a nucleus for more oxygen to be held
features of a white blood cell
they can change shape to engulf pathogens
they have a nucleus
features of platelets
no nucleus
help blood clot at a wound
lack of platelets causes bruising and bleeding
what is plasma
the liquid that carries everything around the body
