blood

Created by

jay sharma

Cards (14)

what is the circulatory system
network of organs and vessels , enables flow of blood and transport of oxygen , carbon dioxide nutrients and other molecules around the body
what are the main components of blood
red blood cells , white blood cells , platelets , plasma
what are red blood cells also known as
erythrocytes
what is the function of rede blood cells
transport oxygen from the lungs to the tissues around the body , transport carbon dioxide from tissue to lungs
how do red blood cells transport oxygen to body cells
in the lungs , haemoglobin in red blood cells binds with oxygen to from oxyhaemoglobin
in the tissues , oxyhaemoglobin breaks down to form haemoglobin and oxygen which diffuses into cells
function of white blood cells
provide immunological protection
name 2 types of white blood cells
phagocytes
lymphocytes
what is the function of platlets
role in blood clotting at the site of a wound
what is plasma
pale-yellow liquid portion of the blood , contains proteins nutrients , watse , products , hormones antibodies etc
three main types of blood vessels
arteries , capillarys , veins
what is the function of the arteries
carry blood away from the heart under high pressure
what is the function of the veins
return blood to the heart under low pressure
how are veins adapted to their function
large lumen eases blood flow , thin wall as blood is at low pressure , thin layer of smooth muscle and elastic fibres , valves prevent backflow of blood
how are capillaries adapted to their function
form a large network therefore there is a greater surface area for diffusion , walls one cell thick giving a short diffusion distance , walls permeable allowing the exchange of substances , narrow lumen decreases diffusion distance