Unit 9 - Cardiovascular system

heart functions (2)

carries nutrients and oxygen to body cells, carries carbon dioxide and waste away from body cells

atria

upper chambers

right atrium

receives oxygen poor blood from the body

left atrium

receives oxygen poor blood from the lungs

ventricles

lower chambers

right ventricle

pumps oxygen rich blood to the lungs

left ventricle

pumps oxygen rich blood to the body

coronary arteries

arteries that wrap around the outside of heart

ischemia

less than normal blood flow to part of your body, caused by narrowing coronary arteries

arteries

carry oxygen rich blood away from heart

veins

carry oxygen poor blood to heart

arterioles

branch off of arteries to connect to cappillaries

venules

merge into veins from cappillaries

cappillaries

where blood transfers nutrients, oxygen, and waste to tissues and organs

SA node (spell)

sinotrial node

SA node

triggers initial electrical impulse in heart