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Histology > New > Flashcards

New Flashcards

1
Q

Two types of Bone Marrow

A
  1. Red

2. Yellow

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2
Q

Red Bone Marrow (3)

A
  1. Stroma (type I and III)
  2. Hematopoeitic Chords
  3. Sinusoidal Capillaries
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3
Q

Major blood forming organ during 2nd trimester

A

Liver

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4
Q

When does Hematopoeisis start

A

Begins during 3rd week of gestation in yolk sac mesoderm

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5
Q

What is Hematopoeisis

A

Blood cell formation

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6
Q

Erythropoeisis

A

RBC Formation

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7
Q

Major blood forming organ after the liver

A

Spleen

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8
Q

Granulopoeisis

A

WBC granulocyte formation

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9
Q

What happens during Granulopoeisis?

A

Specific granule formation and nucleus shape formation

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10
Q

How do platelets arise?

A

From Megakaryocytes

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11
Q

Tunica Intima Cells

A

Single layer of Endothelial Cells

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12
Q

Tunica Media Cells

A

Smooth Muscle Cells

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13
Q

3 Layers of a Vessel

A
  1. Tunica Intima
  2. Tunica Media
  3. Tunica Adventitia
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14
Q

3 Tissues in Blood Vessels

A
  1. Endothelium (Simple Squamous)
  2. Muscle Tissue (Smooth Muscle)
  3. CT (Dense Irregular)
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15
Q

Tunica Adventitia Cells

A

Collagen I and Elastic Fibers

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16
Q

Main conducting artery?

A

Aorta

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17
Q

3 Types of Capillaries

A
  1. Somatic
  2. Fenestrated
  3. Sinusoidal
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18
Q

How do cells attach to Somatic Capillaries?

A

Via Tight Junction

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19
Q

Sinusoidal Capillary Location?

A

Liver and Hematopoeitic Tissue

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20
Q

Fenistrated Capillary Location?

A

Viscera and Kidney

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21
Q

Vein Function

A

Bring deoxygenated blood back to the heart/lungs

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22
Q

Pericytes

A

Cells found around capillaries that help to regulate flow and also help form new vessels after injury

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23
Q

Thickest layer in Large and Medium Veins?

A

Tunica Adventitia (Longitudinal Smooth Muscle)

24
Q

Venules vs Arterioles

A

Venules have enough space for RBCs to travel side by side

25
Q

What do Venules travel with?

A

Arterioles

26
Q

What types of vessels contain valves?

A

All veins and Lymphatic Vessels except Vena Cava

27
Q

Where are Lymphatic Vessels found?

A

In all tissue except Bone Marrow

28
Q

3 Layers of the Heart

A
  1. Endocardium
  2. Myocardium
  3. Epicardium
29
Q

What is the Endocardium made of?

A

Endothelial Cells

30
Q

What is the Myocardium made of?

A

Cardiac Muscle

31
Q

What is in the Subendocardial Layer?

A

Purkinje Fibers

32
Q

Primary Lymphoid Organs

A
  1. Bone Marrow

2. Thymus

33
Q

Bone Marrow Lymphocytes

A

B Lymphocytes

34
Q

Thymus Lymphocytes

A

T Lymphocytes

35
Q

Annuli Fibrosi

A

Serves as attachment for Atrioventricular Valves

36
Q

Trigone Fibrosa

A

Origin and Insertion for swirls of cardiac muscle

37
Q

Where does the Immune Response occur?

A

Secondary Lymphoid Organs

38
Q

2 Types of Immune Response

A
  1. Cellular

2. Humoral

39
Q

What Lymphocytes does the cellular response utilize?

A

T Lymphocytes

40
Q

What Lymphocytes does the humoral response utilize?

A

B Lymphocytes

41
Q

What immune cells are found in Bone Marrow?

A

B Lymphocytes and Natural Killer

42
Q

2 Types of T Lymphocytes

A
  1. Helper Ts

2. Killer Ts

43
Q

Role of Thymus

A

Sets up the Immune System

44
Q

Capillaries found in Thymus?

A

Non-Fenestrated/Continuous

45
Q

3 Types of Cells in the Cortex?

A
  1. Epithelioreticular Cells
  2. Macrophages
  3. Thymocytes
46
Q

What type of cell is the key feature of the Thymus?

A

Hassel’s Corpuscle

47
Q

Largest lymphatic organ?

A

Spleen

48
Q

Spleen Function

A

Blood filter and reservoir

49
Q

What components are in the White Pulp of the Spleen?

A
  1. Germinal Center

2. Central Artery

50
Q

Where does the Splenic Artery enter the Spleen?

A

At the Hilum

51
Q

Periarteriolar Lymphatic Sheath

A

Sheath of T cells immediately surrounding the Central Artery

52
Q

What type of capillaries are Venous Sinuses?

A

Discontinuous

53
Q

Marginal Zone

A

Transition zone between White and Red Pulp

54
Q

In Lymph Nodes, afferent lymphatic vessels enter where?

A

Capsule (Convex Surface)

55
Q

In Lymph Nodes, efferent lymphatic vessels exit where?

A

At the Hilum

Histology (9 decks)

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