This document comes with the original life science document and is more so to do with animals and humans rather than plants. It has everything you need to go regarding that and will ultimately help you in achieving the marks you want.
internal structure:
external structure of heart: • atria: t wo upper chambers blood flow through the heart
• found in middle of thorax • ventricle: t wo lower chambers
• slightly to left • septum: muscular wall separating 1. deoxygenated blood from body
• pericardium: double membrane (fluid left and right sides of heart 2. inferior and superior vena cava
bet ween to prevent friction) • right side: deoxygenated blood 3. right atrium
• cardiac muscle • left side: oxygenated blood 4. tricuspid valve
• coronary blood vessels: supply • atrioventricular valves: valves 5. right ventricle
heart with blood bet ween atrium and ventricles 6. leaves heart
• tricuspid: right 7. pulmonary valve
• bicuspid: left 8. lungs
superior vena cava pulmonary artery
9. oxygenated
·
gen · left atrium
10. heart
·
aorta
-
I
⑭IM
·
pulmonary veins 11. pulmonary veins
transport systems in mammals 12. left atrium
-
*·
↑
E
·
right atrium
left ventricle
13. bicuspid valve
↑
coronary vessels
14. left ventricle
right ventricle
double circulation 15. aortic valve
• pulmonary circulation: 16. aorta
superior vena cava
heart to lungs to heart 17. oxygenated
aorta • systematic : heart to
s body back to heart
og&
right atrium pulmonary artery
g
Blood circulation systems
↑.....
...
=
ot
· (AD
·
pulmonary veins
*
left atrium
3 main parts:
closed circulatory system • blood - the fluid in which
⑲
e
bicuspid valve
• blood confined to vessels
tricuspid valve
e left ventricle
• in most animals
substances flow from one
pulmonary valve
↳ area of body to another
muscular wall
• heart pumps blood around body • blood vessels - tubes in
right ventricle aortic valve
inside vessels (blood returns to which blood circulates
heart) • heart - pumps to circulate
fluid
, the cardiac cycle: a heart beat
1. atrial systole
2. ventricular systole I heart muscle contracts
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