what the heart is made up of?
ARTERIES carry blood AWAY from the heart TOWARDS the organs.
CAPILLIRIES allow food and oxygen to diffuse to cells while waste is diffused from cells.
what can cause heart failier?
High blood pressure is the biggest concern as it increases the risk of a heart attack
A heart attack can happen because:
· Fatty deposits build up in the coronary arteries
· A blood clot can form on a fatty deposit
· The blood clot can block a coronary artery
· Some heart muscle cells do not get the oxygen and nutrients the need
· These cells start to die
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