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Histology Exam 3 > Circ Overview > Flashcards

Circ Overview Flashcards

0
Q

Two components of circulatory system

A

Cardiovascular and lymphatic vascular systems

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1
Q

What makes up the cardiovascular system?

A

Heart and blood vessels

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2
Q

What composes the lymphatic system? Function?

A

One way system of returning EC fluid (lymph) from tissue back to cardiovascular system. Composed of lymphatic vessels and capillaries

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3
Q

Describe rough characteristics and function of arteries

A

Thick walled, muscular tubes, carry high pressure blood, branch into arterioles. Convey blood from heart to tissue

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4
Q

Describe rough characteristics of veins and function

A

Thinner walled, more fibrous than arteries, carry low pressure blood, capacitance vessel, venules
Convey blood from the tissues back to the heart

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5
Q

Describe rough characteristics and function of capillaries

A

Smallest of the blood vessels, once cell thick, allows for exchange of materials
Exchange of gasses and nutrients between blood and tissue occurs here

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6
Q

T or F: Veins and arteries have common embryological origin

A

T

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7
Q

What are the three layers of vein/artery?

A

Tunica adventitia/externa
Tunica media
Tunica intima

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8
Q

What is another layer for the coat of tissue around vein/arteries?

A

Tunica

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9
Q

What is the outer tunica?

A

Tunica adventitia/externa

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10
Q

What is the make-up of the tunica adventitia?

A

Connective tissue (collagen fibers)

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11
Q

Function of tunica adventitia?

A

Anchors blood vessel in the surrounding tissue

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12
Q

T or F: Large veins have smooth muscle fibers in their tunica adventitia?

A

T

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13
Q

Describe the orientation of smooth muscle in the tunica adventitia

A

Longitudinally along the blood vessel

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14
Q

What is vasa vasorum? Where is it located?

A

Small blood vessels serving larger blood vessels

In the tunica adventitia

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15
Q

Where in veins/arteries is the innervation?

A

Tunica adventitia

16
Q

Outer to inner layers of vein/artery tunicas?

A

Tunica adventitia
Tunica media
Tunica intima

17
Q

What are the major components of the tunica media?

A

Smooth muscle fibers arranged circumferentially around the lumen of the vessel
Elastic tissue is also located in this layer

18
Q

Muscular arteries have a large…?

A

Tunica media

19
Q

Inner most tunica in veins/arteries?

A

Tunica intima

20
Q

What makes up the tunica intima?

A

Endothelial cells lining the lumen
Small amounts of loose connective tissue
Basement membrane/basal lamina

21
Q

Arteries have what between the major tunica layers

A

Thick internal elastic membrane between tunica intima and tunica media (sometimes called part of tunica intima)
Sometimes has an external elastic membrane between the tunica media and tunica adventitia

22
Q

Which type of vessel has a thicker vessel wall?

A

Artery

23
Q

Which vessel has a larger lumen?

A

Vein has larger diameter lumen

24
Q

Vessels tend to go from large diameter to smaller diameter as you…

A

Move from heart towards peripheral tissue

25
Q

The tunica intima is larger n?

A

Arteries (slightly)

26
Q

The tunica media is larger in?

A

Arteries, much thicker

27
Q

The tunica adventitia is larger in?

A

About the same size in both

28
Q

Most prominent layer in veins? Artery?

A

Vein - tunica adventitia

Artery - tunica media

29
Q

Valves are found in what type of vessel?

A

Veins

30
Q

Describe the structure of a vein valve

A

Morphological specialization of the tunica intima to prevent back flow of blood.

31
Q

Describe the capillaries between arteries and veins

A

Thin and composed essentially of only a tunica intima

32
Q

Name for the tunica intima of the heart tissue

A

Endocardium

33
Q

Composition of the endocardium

A

Epithelial layer and underlying subendothelial connective tissue

34
Q

Tunica media name for heart tissue

A

Myocardium

35
Q

Composition of the myocardium

A

Cardiac muscle tissue

36
Q

Tunica adventitia equivalent in heart tissue

A

Epicardium

37
Q

Composition of the pericardium

A

Dual layer structure (serous and fibrous, serous inside fibrous outside)
Inner layer is the pericardium and made up of CT
Contains the vaso vasorum of the heart
Merges with the adventitia of the great vessels

38
Q

Describe the pericardium from outside to inside

A

Fibrous pericardium to serous pericardium to space to serous pericardium (visceral layer; epicardium)

Histology Exam 3 (11 decks)

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