Studied by 5 people
what is the circulatory system
a system of blood vessels with a pump to ensure flow of blood
what are the network of tubes in the body
veins and arteries
what is the pump in the body
heart
what helps blood flow in the correct directions
valves
what is oxygenated blood
blood containing a lot of oxygen
what is deoxygenated blood
blood containing only a little oxygen
where does oxygenated blood flow in the heart
left side
where does deoxygenated blood flow in the heart
right side
where does blood get its oxygen
from the lungs
how does blood become deoxygenated
cells take oxygen from blood around body
what is double circuit system
blood passes through the heart twice in one complete circuit
what is a single circuit system
blood passes through the heart only one complete circuit
what animals have double circuit system
birds and reptiles
what animals have single circuit system
fish and amphibians
advantage of double circuit system
high pressure when sent around the body
disadvantage of single circuit system
blood travels slowly
disadvantage of double circuit
loses pressure through body
which is better between double and single circuit system
double
which is worse between double and single circuit system
single
why is double circuit better
blood travels faster
what is the heart
organ size of your fist that pumps blood through your body
what is the heart made of
cardiac muscles
what would you call veins and arteries
network of tubes
where does blood flow in first?
right atrium
where does blood flow in second?
right ventricle
where does blood flow in third?
left atrium
where does blood flow in fourth?
left ventricle
which area has the thickest muscle wall
left ventricle
why does the left ventricle have the thickest wall
needs to increase the pressure of blood to send through the body
what are the atria
upper heart chambers
what are the ventricles
lower heart chambers
what is the septum
separates left and right side of heart
what receives blood from the pulmonary vein
left atrium
what receives blood from the venae cavae
right atrium
what is label 1
aorta
what is label 2
superior vena cava
what is label 3
right pulmonary artery
what is label 4
right pulmonary veins
what is label 5
right atrium
what is label 6
tricuspid valve
what is label 7
right ventricle
what is label 8
inferior vena cava
what is label 9
left pulmonary artery
what is label 10
left pulmonary veins
what is label 11
left atrium
what is label 12
bicuspid valve
what is label 13
aotic valves
what is label 14
left ventricle
what is the valve between right atrium and ventricle
tricusoid
what is the valve between left atrium and ventricle
mitral valve
what is the valve between right ventricle and the lungs
pulmonary valve
what valve between left ventricle and rest of the body
aortic valve
why is the right ventricle muscle not very thick
sends blood to the lungs which is close by
what are coronary arteries
vessels that deliver oxygenated blood to the heart muscles
where do you find coronary arteries
outside the heart
why does the heart have coronary arteries
needs a supply of hearts too
why does the heart need a supply of blood
to undergo respiration for muscles contracting
what do you call the disease when the coronary arteries are blocked
CHD
what does CHD stand for
coronary heart disease
what can block coronary arteries
cholesterol
how does cholesterol block coronary arteries
builds up on the walls
what happens to the arteries lumen when cholesterol deposits build up
becomes narrower
what happens to the arteries walls when cholesterol deposit build up
becomes stiffer
what is the main issue of the coronary arteries getting blocked
blood clots
when the coronary artery is blocked, what issue occurs
cardiac muscles can’t receive oxygen
when the cardiac muscles don’t receive oxygen
cannot obtain energy and stops beating
what is the most common outcome of someone with CHD
death
how can you avoid CHD
stop smoking, watch diet, exercise
why should you stop smoking
it increases plaque formation in blood vessels
why should you watch your diet
avoid saturated fats
why should you exercise regularly
decreases blood pressure
what is a heartbeat
rhythmic contraction and relaxation of heart muscles
what is pulse rate
expansion and relaxation of an artery by pushing blood through it every minute
what does ECG stand for
electrocardiograph
what is a normal heartbeat at rest
60-75 bpm
what does bpm stand for
beats per minute
when you hear a heart beat “lub-dub“ where is that sound coming from
opening and closing of valves
how can you measure heartbeat
ECG and pulse rate
what is your pulse rate
your heart rate
common place to check pulse rate by yourself
side of neck
what does the ECG do to get your heartbeat
records and graphs electrical activity in heart
how do they get the electrical activity in the heart using an ECG
sick electrodes on person’s body
how do valves close in the heart because of the ventricles
blood pushed up onto it
what stops the valves from swinging back open after blood pushes up on them
tendons
what are blood vessels
channels that carry blood throughout your body that form a closed loop
what are the blood vessels
arteries, veins, capillaries
where do the arteries send blood
away from heart
where do the veins send blood
to the heart
where do the capillaries send blood
to organs in the body
after arteries what comes next
capillaries
after capillaries what comes next
veins
after veins what comes next
the heart
what divides into capillaries
arteries
what do joined back capillaries form
veins
why do we need valves in the veins
to keep blood flowing in the correct direction
why does blood need to keep flowing in the correct direction
to combat gravity in large bodies
what is an artery
a thick-walled vessel that takes high-pressure blood away from the heart
what are capillaries
tiny vessels with walls only one cell thick
what are veins
thin-walled vessels that takes high-pressure blood away from the heart
which one is the artery
v
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Flashcard (201)