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Histology > Cardiology > Flashcards

Cardiology Flashcards

1
Q

What is the tunica media made up of?

A

Muscle

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2
Q

What is the outlayer made up of?

A

Tunica adventitia= connective tissue

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3
Q

What is the name of the blood supply to the large elastic arteries?

A

Vaso vasorum

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4
Q

What is the make up of arterioles?

A

Only have one or two layers of muscle

No adventitia

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5
Q

What are pericytes and where are they situated?

A

Just outside the basal lamina in capillaries.

They are connective tissue with CONTRACTILE properties

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6
Q

What are the three types of capillary?

A

Continuous
Fenestrated
Sinusoidal or discontinuoous

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7
Q

What are valves?

A

Inward extensions of the tunica media

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8
Q

What are the three layers in the heart?

A

Endocardium
Mycocardium
Epicardium

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9
Q

What is a subendocardium?

A

Loose connective tissue containing small blood vessels and nerves and the branches of the impulse conductin system

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10
Q

What is the histology of cardiac cells?

A

Small single central nucleus

Connected by intercalated discs

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11
Q

What type of epithelium if present on the epicardium?

A

Mesothelium

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12
Q

What is the fibrous pericardium made of>

A

Sac of tough fibrocollagenous connective tissue

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13
Q

What is the serous pericardium made up of?

A

Simple Squamous epithelial cells (mesothelium)

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14
Q

What is the lamina fibrosa?

A

A core of dense connective tissue in heart valves the forms part of the fibrous skeleton

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15
Q

What are the leaflets of the valves anchored to in the wall of the ventricle?

A

Papillary muscles

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16
Q

What is the name of the collagenous strands that connect the valves with the papillary muscles?

A

Chordae tendinae

17
Q

True or false: the heart valves have blood vessels?

A

False

18
Q

What are the three types of cardiac muscle cells?

A

Contractile
PAcemaker
Conducting

19
Q

What is the histology of a pacemaker cells?

A

Smaller than myocytes

Lack myofibrils and organelles

20
Q

What is the histology of the purkinje fibres?

A

Larger than cardiac myocytes
found inthe subendocardial layer
Abundant glycogen
No discs, little actin/myosn or t tubules

21
Q

What do lymphatic capillaries begin as ?

A

Blind sacs

22
Q

What is the histology of lymphatic vessels?

A

No central pump.
They have smooth muscle in their walls.
They have valves.

Histology (4 decks)

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