Summary
Summary Mass Transport in Animals Notes
- Institution
- AQA
Includes an in depth detail of the gross structure of the heart and function of the heart, and how an EEG works through the cardiac cycle and the formation of tissue fluid.
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, circulatory system·
multicellular organs have a low Sa : V ratio : need a circulatory system
.
·
circulatory system is a double circulatory system because blood passes through heart twice In I complete circuit
of body
.
·
closed circulatory system : blood fully enclosed in vessels at all times
circulatory system made up of heart+ blood vessels
·
blood transports respiratory gases , products of digestion metabolic
,
wastes + hormones round the body . 2 circuits :
L I takes blood from heart lungs >
-
heart
2 takes blood to rest of body
Coronary Arteries
·
supply heart muscle with essential nutrients + oxygen .
these cells have high conc of Mitochondria for aerobic resp
to generate ATP
·
If coronary arteries was blocked , cells wouldn't be able to respire , heart can't contract , tissues die as heart tissue
deprived of glucose + oxygen
.
aorta
·
supplies coronary artery with blood
.
① Right atrium :
receives deoxygenated blood from body
② inferior vena cava-brings deoxy blood from lower part of body
to right atrium
⑤ superior vena cava-brings blood from upper body + transports It to
right atrium
& BICUspid Valve (leftAV) allow blood from LA to LV
= +
prevents backflow
⑤ Tricuspid Value (right Avl = allows blood from RA-RV +
stops backflow
⑥ Right ventricles pumps deoxy blood
: to lungs
⑦ pulmonary = carry deoxy blood from Rvelungs
arteries
⑧ Left atrium =
receives oxy blood from lungs
⑨ pulmonary veins =
carries oxy blood from lungs - LA
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