662561
Description
Mind Map by arsenaltwins, updated more than 1 year ago
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Created by arsenaltwins
about 11 years ago
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Heart
- Two parts of the heart
- Atrium
- Ventircle
- Separated by valves:
- Left atrioventricular (bicuspid)
- Right atrioventricular (tricuspid)
- Left atrioventricular (bicuspid)
- Atrium
- Vessels connecting to the four chambers of the heart
- Aorta - left ventricle and carries
O2 blood to the body apart from
the lungs
- Vena Cava
- Connected to right atrium, and
brings de02 blood back from
tissues of the body
- Connected to right atrium, and
brings de02 blood back from
tissues of the body
- Pulmonary artery
- connected to right ventricle
and carries de02 blood to the
lungs
- connected to right ventricle
and carries de02 blood to the
lungs
- Pulmonary vein
- connected to left atrium
and brings 02 blood back
from lungs
- connected to left atrium
and brings 02 blood back
from lungs
- Aorta - left ventricle and carries
O2 blood to the body apart from
the lungs
- Coronary arteries supply the
heart with its respiratory needs.
- a blockage of these arteries, e.g
by a blood clot, leads to
myocardial infarction, or heart
attack, as an are of the heart is
deprived of 02 and thus dies.
- a blockage of these arteries, e.g
by a blood clot, leads to
myocardial infarction, or heart
attack, as an are of the heart is
deprived of 02 and thus dies.
- Relaxation of the heart (diastole)
- Blood returns to the atria of the
heart from the pulmonary vein (from
the lungs) and the vena Cava (from
the body)
- As the atria fill, the
pressure in them rises,
causing the AV valves
to open, and so, blood
passes into the
ventricles
- The walls of the atria
and ventricles are
relaxed at this stage.
- Blood returns to the atria of the
heart from the pulmonary vein (from
the lungs) and the vena Cava (from
the body)
- Contraction of atria (atrial systole)
- The thin muscle walls of the
atria contract, and so, the
remaining blood is pushed
into the ventricles.
- The thin muscle walls of the
atria contract, and so, the
remaining blood is pushed
into the ventricles.
- Contraction of ventricles
- After they're filled, their walls
contract simultaneously,
increasing the pressure in them.
The AV vavles close to prevent
back flow.
- As the
pressure
rises, the
semi-lunar
valves
open,
therefore
blood is
pushed into
the
pulmonary
artery and
aorta.
- After they're filled, their walls
contract simultaneously,
increasing the pressure in them.
The AV vavles close to prevent
back flow.
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