SM 108a - Cardiovascular Histology Flashcards Preview

CVB by Minnie (Madeleine) > SM 108a - Cardiovascular Histology > Flashcards

Flashcards in SM 108a - Cardiovascular Histology Deck (20)
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1
Q

What kind of blood vessel is this?

A

Elastic artery

  • Thick tunica media with alternating layers of smooth muscle and fenestrated elastic lamellae
2
Q

What are the defining characteristics of muscular arteries?

A
  • Tunica intima
    • Thin, prominent internal elastic membrane
  • Tunica media
    • Prominent smooth muscle layer
    • Some elastic lamellae is present, but it does not alternate with smooth muscle
  • Tunica adventitia
    • External elastic membrane at the interface with the tunica media
3
Q

What are the defining characteristics of elastic arteries?

A
  • Thick tunica media
    • Alternating layers of smooth muscle and fenestrated elastic lamellae
    • This allows for stretch to accomodate large volumes of blood
4
Q

Where in the body are continuous capillaries found?

A

Nervous system (blood brain barrier)

Muscle

Fat

5
Q

What are the major general differences between veins and arteries?

A
  • Veins have larger lumens
  • Arteries have thicker walls
6
Q

Where in the body are fenestrated capillaries found?

A

Where extensive passage of fluid and metaboilites is required

  • Endocrine organs
  • GI tract
  • Galbladder
  • Kidney
7
Q

What is the function of arterioles?

A

Control blood flow into capillary beds to protect them from high pressure

8
Q

What kind of blood vessel is this?

A

Discontinuous/sinusoid capillary

  • Gaps between cells and basement membrane
9
Q

What are the 3 basic layers of the cardiovascular system?

A
  • Tunica intima
    • Closest to lumen
    • Endothelium
      • Simple squamous everywhere except heart
      • Stratified squamous in the heart
    • Thin layer of connective tissue
  • Tunica media
    • Thickest middle layer
    • Made from smooth muscle
  • Tunica adventitia
    • Outer layer of connective tissue
    • Blends with the surrounding tissue
10
Q

What kind of blood vessel is arrow #5 pointing to?

A

Venule

  • Single layer of smooth muscle
11
Q

What is the function of muscular arteries?

A

Maintain blood pressure

12
Q

What kind of blood vessel is this?

A

Muscular artery

  • Smooth muscle tunica media with no alternating elastic laminae
13
Q

What kind of blood vessel is this?

A

Large vein (superior or inverior vena cava)

  • Thick tunica adventitia with bundles of longitudinal muscle
14
Q

What kind of blood vessel is this?

A

Fenesrated capillary

  • Tight junctions between cells
  • Continuous basement membrane
  • Pores in the tunica intima
15
Q

What kind of blood vessel is arrow #6 pointing to?

A

Arteriole

  • 2 layers of smooth muscle
16
Q

Where in the body are discontinuous capillaries found?

A

Liver

Spleen

Bone marrow

17
Q

What kind of blood vessel is this?

A

Continuous capillary

  • Tight junctions
  • Continuous basement membrane
18
Q

What is a pericyte?

Where is it found?

A

Multi-functional cell with various properties

  • Stem cell
  • Contracticle
  • Role in vascular network formation

Found in the basement membrane adjacent to endothelial cells

19
Q

Where in the circulation is most of our blood found at any given time?

A

Veins

20
Q

What kind of blood vessel is this?

A

Small or medium vein

  • Thin intima and media
  • Some bundles of longitudinal muscle in adventitia, at interface with media

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