Bioscience - Cardiovascular 2020

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What is the name of the cavity that the heart sits within
The mediastinum
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The heart is covered by a set of membranes called the
The pericardium
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Mammals including humans have a double circulation, what does that mean?
The blood visits the heart twice on its journey through two circuits
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The pressure in the blood vessels is the lowest in
Veins
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The hepatic portal vein
A vein carrying deoxygenated but nutrient rich blood from the small intestine to the liver for nutrient processing, before going to the heart
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The hepatic portal vein in the foetal circulation is
Not present as a connecting vein in the foetus
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The foramen ovale
Forms a connection between the right and left atrium
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The pericardial cavity contains
Fluid
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The thickest walls of the heart are found in
The left ventricle
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The heart valve that separate the right atrium from the right ventricle is called
The tricuspid valve
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The aorta leaves the
Left ventricle
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The complete cardiac cycle duration is
0.8 second
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Most of the blood leaving the atria occurs because of
Blood pressure exceeding that in ventricles, open valves and gravity
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Heart sounds are often referred to as the ‘lub-dub’. They represent:
The closing of the atrioventricular valves followed by the closing of the semilunar valves
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The heart muscles respond to the action of the pacemaker (sinoatrial node) its role is to directly ….
Initiate the contraction of the atria
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The fibres that run down the septum of the heart carrying the impulse initiated by the pacemakers are called
The Bundle of His
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Define the term stroke volume, and give a typical volume
The amount of blood pumped by the left ventricle in one contraction. Normally, only about two-thirds of the blood in the ventricle is expelled with each beat. Approximately 70mls
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Define the term cardiac output, and give a typical volume
The amount of blood the heart pumps through the circulatory system in a minute. Approximately 4 to 8 ltrs.
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Observe the ECG illustration below
P wave that represents atrial contraction
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The diagram shows a blood vessel, it is
The aorta leaving the left ventricle
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Capillaries are
Made up of a single layer of squamous epithelial cells
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Other cards in this set

Card 2

Front

The heart is covered by a set of membranes called the

Back

The pericardium

Card 3

Front

Mammals including humans have a double circulation, what does that mean?

Back

Preview of the front of card 3

Card 4

Front

The pressure in the blood vessels is the lowest in

Back

Preview of the front of card 4

Card 5

Front

The hepatic portal vein

Back

Preview of the front of card 5
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