the heart Flashcards
1
Q
superiot and inferior vena cava
A
transport deoxygenated blood from the organs to the heart
2
Q
right atrium
A
- receives deoxygenated blood from the vena cava and passes it to the right ventricle
- the wall is less muscular
3
Q
right ventricle
A
- pimps oxygen-poor blood into the pulmonary artery
- muscular wall
4
Q
pulmonary arteries
A
transport deoxygenated blood from the heart to the lungs
5
Q
pulmonary veins
A
transport oxygen rich blood from the lungs to the heart
6
Q
left atrium -
A
- receives oxygen-rich blood from the pulmonary veins and passes it to the left ventricle
- the wall is less muscular
7
Q
left ventricles
A
- pumps oxygen rich blood into the aorta
- very muscular valves
8
Q
aorta
A
transport oxygen-rich blood from the heart to the organs
9
Q
cardiac septum
A
partition between the left and right halves of the heart
10
Q
heart valves
A
- valves between atria and ventricle
- prevent the blood flowing back from the ventricle to the atria
11
Q
semilunar valves
A
- valves at the entrances to the pulmonary artery and the aorta
- prevent the blood from flowing back from the pulmonary artery and aorta in the atria
12
Q
coronary veins
A
transport blood that is rich in carbon dioxide and other waste products away from the heart muscle
13
Q
coronary arteries
A
- branch off the aorta
- carry oxygen rich blood and rich of nutrients to the heart muscle
14
Q
heart beat
A
contraction atria - contraction ventricles - cardiac pause
15
Q
contraction atria
A
- atria contract –> blood flows into the ventricles
- heart valves are open, semilunar valves are closed
16
Q
contraction ventricles
A
- ventricles contract
- heart valves close
- pressure in the ventricles increases
- semilunar valves open
- blood pump into pulmonary artery and aorta
17
Q
cardiac pause
A
- both atria and venticles relax
- blood flows from the vena cava and pulmonry veins into the atria and veinricles
- heart valves are open, semilunar valves closed
