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Cardio Pulm > Histology (Caridac) > Flashcards

Histology (Caridac) Flashcards

1
Q

What tissue is this (yellow arrow)?

A

Smooth muscle

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2
Q

Compared to other muscle types, smooth muscle is ______________ & ______________.

A

non-striated and involuntary

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3
Q

The contractile proteins in smooth muscle are ____________ & ____________.

A

Actin and myosin

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4
Q

What type of tissue is this and what are it’s characteristics?

A
  • Caridac muscle
  • Striated and involuntary
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5
Q

What are the contractile proteins found in cardiac muscle?

A

Actin and Myosin

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6
Q

1) Give both names for the layer (blue arrow)?
2) What is it (#1) comprised of?
3) What is the structure (yellow)?

A

1) Epicardium & visceral serous pericardium
2) Dense fibrocollangenous CT, lined with mesothelium
3) Myocardium

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7
Q

4) What is the outmost layer lined with?
5) What is this structure?

A

4) Mesothelim (simple squamous epithelium)
5) Purkinje fibers (subendocarial branches)

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8
Q
  1. What are these structures (arrows)?
  2. What is the purpose of them and in what layer of the heart wall are they located?
A

1) Intercalated discs
2) Specialized junctions that bind cells together and allow spread of excitation; located in myocardium

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9
Q

What are these structures (yellow arrows) and where are they located in realation to sarcomere?

A
  • Intercalated discs
  • Coincide with Z-lines
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10
Q

What are the 2 regions of intercalated discs?

A

1) Transverse region
2) Lateral region

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11
Q

What are the components and function of transverse region of intercalated disc?

A
  • Fascia adherentes: anchoring site for actin filaments of terminal sarcomeres to the plasma membrane
  • Maculae adherentes (desmosomes): hold contractile cardiocytes tightly together
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12
Q

What are the components and funtion of the lateral region of intercalated discs?

A
  • Gap junctions
  • Allow ions to travel cell-to-cell
  • Causes ionic coupling allowing connected cells to function as one unit
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13
Q

Label 1, 3, and 5 and state which region of the intercalated disc they are found in and their function?

A

1) Fascia adherentes (transverse region) - anchoring site for actin filmanents of terminal sarcomeres
3) Gap junction (lateral region) - excitation to pass b/w cells
5) Desmosome (transverse region) - anchor contractile cardiocytes tightly together

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14
Q

What is this structure and what is it comprised of?

A

Heart valve; core of fibroelastic CT, covered with endothelium

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15
Q
  1. What is this portion of the valve
  2. What is found lining heart valves (bottom arrow)?
A
  1. Cardiac/fibrous skeleton
  2. Endothelium
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16
Q

What is this a picture of and label 1-5.

A
  • Elastic artery (due to extensive thickness of tunica media)
    1) Tunica media
    2) IEL (internal elastic lamina)
    3) Tunica intima
    4) Endothelium
    5) Vaso vasorum
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17
Q

What is the structure depicted here?

Label 1-4

A
  • Large vein (vena cava)
    1) Tunica media
    2) Tunica adventitia
    3) Tunica intima
    4) Simple squamous epithelium
18
Q
  1. What is this structure?
  2. What is denoted by the yellow arrow?
  3. What is denoted by the blue arrow?
  4. What is this structure (white arrow)?
A

1) Elastic artery
2) Tunica media
3) Tunica adventitia
4) Internal elastic lamina

19
Q

What is this structure (yellow arrow)?

A

Large vein

20
Q

What are the tunics found in veins? Describe

A
  • Tunica Intima: endothelium lining the vessels
  • Tunica Media: few layers (elastin fibers and smooth muscle)
  • Tunica Adeventitia: thickest
21
Q

What are the layers indicated by the white and black arrows?

A

White arrow: Tunica Adventitia

Black arrow: Tunica Media

22
Q

1) What is denoted by the black arrow?’
2) What denoted by the red arrow?
3) What is this structure?

A

1) Muscular artery
2) Medium Vein
3) Valves in vein

23
Q

Identify A and B

A

A) Muscular artery

B) Medium vein

24
Q

1) Identify A vs. B
2) Describe the tunics associated with each

A

A) Venule (small vein); all three tunics, adventitia is most prominent

B) Small musular artery; elastic fibers in the internal and external elastic laminae, proportionally thicker tunica media with smooth muscle

25
Q

Identify A vs. B

A

A) Arteriole

B) Venule

26
Q

What are the 3 types of capillaries?

A

1) Continous
2) Fenestrated
3) Discontinous (Sinusoidal)

27
Q

Characteristics of continous capillaries; where they found?

A
  • Somatic capillaries
  • Nonporous
  • Muscle, brain, peripheral nerves, exocrine glands
28
Q

Characteristics of fenestrated capillaries; where are they found?

A
  • Visceral capillaries
  • Porous limited to the size of a macromolecule
  • Kidneys, intestine, exocrine glands
29
Q

Characteristics of discontinous capillaries; where are they found?

A
  • Sinusoidal
  • Large gaps between endothelial cells
  • Abundant fenestrations
  • Found in hematopoietic organs (bone marrow, liver, spleen)
  • Phagocytotic cells often found interspersed along endothelial walls
30
Q

Identify this structure? What are its distnguishing features?

A
  • Lymphatic vessels
  • Lack RBCs, thinner walls than other vessels
31
Q

What are these structures?

A
  • Lympthatic vessels
32
Q

What prevents the backflow of lymph in lympathic vessels?

A

Valves

33
Q

What is this a picture of?

A

Lymphatic vessel

34
Q

What is this?

A

Medium-sized vein

35
Q

What is this?

A

Venule

36
Q

What is this?

A

Large Vein

37
Q

What is this?

A

Muscular artery

38
Q

What is this?

A

Elastic artery

39
Q

What is this?

A

Arteriole

40
Q

Which veins have a projection of tunica intima into their lumen?

A

Medium sized veins

Cardio Pulm (2 decks)

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