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Flashcards in Heart Deck (38)
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1
Q

what is the pericardial membrane composed of

A

fibrous pericardium and serous pericardium

2
Q

visecral layer of the heart (covers)

A

serous pericardium

3
Q

secretes thin lubricating fluid

A

serous pericaridium

4
Q

space in between 2 pericardial membrane

A

pericardial cavity

5
Q

muscle tissue of the heart

A

myocardium

6
Q

inner lining of the heart

A

endocardium

7
Q

where is the apex of the heart?

A

the inferior part

8
Q

where does most muscle mass of the heart belong to?

A

the ventricles

9
Q

ear like flaps of the atria

A

auricles

10
Q

inferior pumping chambers

A

ventricles

11
Q

superior chambers of the heart

A

atria

12
Q

what are the large vessels attached to the heart ?

A

superior/inferior vena canva, pulmonary trunk, pulmonary veins, aorta.

13
Q

right atrium is composed of

A

superior/inferior vena canva

14
Q

the right ventricle

A

pulmonary trunk

15
Q

left atrium is composed of

A

pulmonary veins

16
Q

the aorta is in the

A

left ventricle

17
Q

The branching and reconnecting many coronary arteries

A

anastomosis

18
Q

drain blood from the heart muscle and lead back to the cornary sinus before feeding into right atrium

A

cardiac veins

19
Q

what is likely to develop blockage in some people which is medically significant

A

coronary arteries

20
Q

shunts blood around blockage

A

bypass surgery

21
Q

prevent back flow and improve effiency

A

valves

22
Q

parachute-like”valves between each atrium and ventricle and prevent blood from being pushed back up intot he atria.

A

AV Valves

23
Q

What happens when pressure builds under AV valves

A

they inflate (like a parachute)

24
Q

the _____ of AV valves closes of the opening between atria and ventricles

A

inflating

25
Q

pocket valves at the base of the aorta and pulmonary trunk.

A

semilunar valves

26
Q

what is the cardiac cycle?

A

dynamic muscle contraction driven changes by pressure and volume

27
Q

which chambers fill with blood as the heart relaxes?

A

all chambers fill with blood

28
Q

2 parts of ventricle filling

A

passive ventricular filling and atrial contraction

29
Q

blood is sucked in as the heart expands. when the heart relaxes and all four chambers fill passively

A

passive ventricular filling

30
Q

Atria contract pushing another 20-30 percent into the ventricles

A

atrial contraction

31
Q

true or false: the heart does not need neurons to contract.

A

true

32
Q

true or false: the heart is able to contract by itself once per second

A

true

33
Q

true or false: the nervous system has no influence on heart rate

A

false

34
Q

true or false: the nervous system is directly responsible for causing heart contractions

A

false

35
Q

The amount of blood the ventricles pump with each contraction is

A

Stroke volume

36
Q

One of the biggest factors in stoke volume

A

venous return

37
Q

Amount of blood entering the heart from the great veins

A

venous return

38
Q

What is the easiest way to influence cardiac output?

A

Modifying heart rate