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CIRCULATORY SYSTEM - Coggle Diagram
CIRCULATORY SYSTEM
BLOOD VESSELS
ARTERIES
heart to organs
high pressure
walls strong/elastic
CAPILLARIES
very small diameter
dense networks into organs
exchange blood-cells
VEINS
organs to heart
thinner walls
low pressure
HEART
STRUCTURE
myocardium
muscle walls
2 ventricles
blood out of heart (through arteries)
2 atria
blood into heart (through veins)
HEARTBEAT (CARDIAC CYCLE)
2.ventricular contraction (systole)
blood out of the heart
first sound (atrioventricular valves closed)
3.Diastole (relaxation)
atria fill with blood from veins
second sound (artery valves closed)
1.atrial contraction (systole)
blood to ventricles
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
DOUBLE CIRCULATION
SYSTEMIC LOOP
exchange nutrients and gas (capillaries)
blood with CO2 and wastes
tissues
right atria from cava veins
left ventricle to aorta artery
PULMONARY LOOP
lungs
gas exchange (oxygen in /co2 out)
right ventricle to pulmonar arteries
left atria from pulmonary veins
HEALTH
BLOOD DISORDERS
anaemia
low haemoglobin levels (low iron)
get tired easily (low energy)
balanced diet
leukaemia
cancer bone marrow
deficient production of blood cells
BLOCKED ARTERIES
lipids (cholesterol) in walls
artery diameter reduced
atherosclerosis
in heart (coronary arteries)
myocardial infarction (heart attack)
partially blocked
angina pectoris