Wk 8- Functions Of Cardiovascukar System Flashcards

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1
Q

Cardiac physiology:

  1. Receives oxygen - blood and pumps to the ? through the pulmonary a? for pulmonary c?
  2. Receives oxygen - blood from the - and pumps blood through body. S? circulation
A
  1. Oxygen Poor , lungs, pulmonary artery , circulation

2. Oxygen rich , lungs, systemic

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2
Q

Blood distribution

64%- systemic v- and venules (reservoirs) 
13%- systemic a- and arterioles
9%- p- vessels 
7%- h-
7%- systemic ca?
A
Veins
Arteries 
Pulmonary 
Heart
Capillaries
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3
Q

Cardiac muscle cells:

Connected via intercalated di?
Gap ? transmit a- potentials
D? make tight connections
P? maker cells control c- : the intrinsic conduction system

A

Discs
Junctions , action
Desmosomes
Pacemaker , contraction

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4
Q

Sequence of Cardiac contraction:

SA node >atrium >AV node >ventricles >AV bundle his >apex Perkinje fibres >^ starts again

SA node of r? atrium cells de?
De? atrial muscle tissue via ?junctions = contraction ar? walls

A

Right , depolarise
Depolarised , gap
Atrial walls

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5
Q
Cardiac electrical conduction 
1. SA node > - activation 
2. AV node 
3. AV node > - contraction 
4. AV bundles (-) > send to p- fibres 
5. P- fibres > relay impulse myo?
Atrial contraction is complete. 
V? contraction begins
A

1.Atrial
3.Atrial
4.His , Perkinje
5.Perkinje , myocardium
ventricular

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6
Q

Electrocardiography (ECG)
Impulses depolarisation and repolarisation

What are the 3 phases of wave patterns? How many waves in each ?
P wave - Atrial ? 1 Wave
QRS wave - atrial ? ventricular ? 3 Wave(s)
T wave- ventricular ? 1 wave

A

P wave - atrial depolarisation, 1 wave
QRS wave - atrial repolarisation, ventricular depolarisation , 3 waves
T wave- ventricular repolarisation , 1 wave

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7
Q

CV vascular system:

Arteries: carry blood - from heart
Capillaries : connect ar? and ve? systems
Veins: r- blood to the ?

A

Away
Arterial and veinous
Returns , heart

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8
Q

Capillaries:

Exchange g-, n-, w-, between blood and - fluid.
What are the 3 types of capillaries ?
1. Con? : most common and least porous
2. Fen? : most common in Renal system
3. Sin? : leaky most porous. Found in red bone marrow and liver

A

Gas, nutrients, waste, Interstitial

  1. Continuous
  2. Fenestrated
  3. Sinusoid
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9
Q

The travel sequence of blood through capillaries

Capillary > post capillary ven? > mus? ven? > veins (valves)
Venous valves = - way
Prevent blood - flow
Prevent blood - in limbs

A
Venules 
Muscular venules 
1 way 
Back flow 
Pooling
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