Heart and Blood Vessel Flashcards

1
Q

What is the right heart associated with?

A

Pulmonary Circulation

Fed by inferior and superior venae cavae - Blood sent to lungs by pulmonary trunk

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2
Q

What is Left Heart associated with?

A

Systemic circulation - fed by pulmonary veins - blood sent to body via the aorta

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3
Q

What is the tough fibrous sac that covers the Heart?

A

Fibrous Pericardium

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4
Q

What is the pericardium’s role?

A

Prevents heart from over-expanding and limits heart motion

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5
Q

Where does the Pericardium attach?

A

Attached to the great vessels at the base of the heart and to central tendon of diaphragm

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6
Q

What is the serous pericardium?

A

Two layers that enclose the pericardial cavity

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7
Q

What is the two layers of serous pericardium?

A

Parietal Pericardium - lines internal surface of fibrous pericardium
Visceral Pericardium - lines the heart (part of epicardium)

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8
Q

What are the 3 Layers of the Heart Wall?

A

Epicardium
Myocardium
Endocardium

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9
Q

What make up the Epicardium?

A

Visceral Pericardium -simple squamous epithelium

Subepicardium - loose C.T and adipose tissue containing coronary vessels and nerves that supply the heart

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10
Q

What is the myocardium?

A

Thickest layer of the Heart Wall

Bundles of layers of cardiac muscle cells

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11
Q

What is the endocardium?

A

Smooth inner lining of endothelial cells

Subendocardium - loose C.T containing small blood vessels and branches of the conducting system of the heart

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12
Q

What are Heart Valves composed of?

A

Fibrous C.T (covered with endocardium)

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13
Q

What are the atrioventricular valves (AV) ?

A

Right AV - 3 Cusps (tricuspid)

Left AV - 2 Cusps (bicuspid)

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14
Q

What connects AV Valves to papillary muslces?

A

Chordae Tendineae

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15
Q

What do semilunar valves do?

A

Control blood into great arteries

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16
Q

What is the pace maker of the heart?

A

Sinoatrial (SA) node

17
Q

Function and location of the SA Node?

A

Causes atrial contraction

Located in wall of superior vena cava and right atrium

18
Q

Location and function of Atrioventricular (AV) Node

A

Septum between atria

Begins ventricular Contraction

19
Q

What makes up the conducting system of the heart?

A

Atrioventricular Bundle - Bundle of His

Divides into 2 fibres of Purkinje Fibres

20
Q

Location and Function of Purkinje Fibres?

A

Occur in dense CT of endocardium
Supply Papillary muscles first then apex of heart
Causes wave of ventricular contraction

21
Q

Layers of a blood Vessel

A

Tunica Intima - endothelium and CT
Tunica media - smooth muscle, collagen and elastic fibres
Tunica Adventitia - Loose CT, can have blood vessels and nerves

22
Q

types of arteries

A

Elastic Arteries
Muscular arteries
arterioles

23
Q

Role of Capillaries?

A

link arterial and venous circulation - microcirculation

site of gas exchange

24
Q

Types of Capillaries ?

A

Continuous
Fenestrated
Discontinuous ( Sinusoids )