Circulation - Blood Flashcards
what are the key functions of the circulatory system
transport
regulation
protection
what are the 4 main components of blood (be specific)
heart= pumps blood around the circulatory system
arteries = carried blood away from the heart
veins = returns blood to the heart
capillaries = pass through tissues, connecting the arterial system to the veins
what does the plasma contain
nutrients
hormones
CO2
proteins
what is a platelets
fragments of cells that are involved in clotting
what do red blood cells do
transport oxygen around the body
what do white blood cells do
function in defence
describe the process of erythropoiesis
red blood cells production
it is a hormone made by kidneys which stimulates the production
name the 4 different types of blood groups
A, B, AB and O
what is haematopoiesis and where does it occur and where is it derived from
blood cell formation
occurs in red bone marrow
derived from hemocytoblasts
what do erythrocytes contain
haemoglobin
how does blood donation work
people with O type are universal donors
people with A+B are universal recipients
what is a platelets and what is it involves with
are cell fragments used in blood clotting
they lack a nucleus
