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CIRCULATORY SYSTEM - Coggle Diagram
CIRCULATORY SYSTEM
BLOOD VESSELS
veins
organs to heart
thinner walls
low pressure
capillaries
exchange blood-cells
dense networks into organs
very small diameter
arteries
heart to organs
high pressure
walls strong/elastic
HEART
STRUCTURE
myocardium
muscle walls
2 atria
ventricles
HEARTBEAT (cardiac cycle)
ventricular contraction (systole)
first sound (atrioventricular valves closed)
blood out of the heart
atrial contraction (systole)
blood to ventricles
diastole (relaxation)
atria fill with blood from veins
second sound (artery valves closed)
DOUBLE CIRCULATION
SYSTEMIC LOOP
left ventricle to aorta artery
tissues
exchange nutrients and gas (capillaries)
blood with CO2 and wastes
right atria from cava veins
PULMONARY LOOP
right ventricle
lungs
gas exchange (oxygen in (co2 out)
left atria pulmonary veins
HEALTH
blocked arteries
lipids (cholesterol) in walls
artery diameter reduced
atherosclerosis
in heart (coronary arteries)
myocardial infraction (heart attack)
partially blocked
angina pectoris
blood disorders
anaemia
low haemoglobin levels (low ieon)
get tired easily (low energy
leukaemia
cancer bone marrow
deficient production of blood cells
BLOOD
BLOOD CELLS
white cells
protect against infections
with nucleus
PLATELETS
stop bleeding (clots)
fragments / small groups
red cells
no nucleus
doubly concave
transport oxygen (haemoglobin)
PLASMA
mostly water
liguid / yellow
transport nutrients/wastes