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Histology > Histology of Epithelium > Flashcards

Histology of Epithelium Flashcards

1
Q

Which stains are commonly used

A

Hematoxylin & Eosin

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2
Q

In H&E stain the nucleus/cytoplasm/Collagen fibres/Muscles are

A

Nucleus- blue
Cytoplasm- pink or red
Collagen fibres- pink
Muscles- pink

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3
Q

Other stains beside H&E

A

Masson’s Trichrome, Periodic Acid- Schiff Reaction etc.

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4
Q

Types of tissues based on location

A

Epithelial
Connective
Muscular
Nervous

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5
Q

Types of Epithelium

A

Simple
Pseudostratified
Stratified

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6
Q

Types of Simple epithelium cells

A

Squamous
Columnar
Cuboidal

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7
Q

Types of stratified epithelium cells

A

Non- Keratinized squamous
Keratinized Squamous
Transitional

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8
Q

Simple Squamous description

A

Single layer of flat or squamous cells

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9
Q

Simple Cuboidal description

A

Single layer of round cells

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10
Q

Simple Columnar description

A

Tall cells lined by microvilli

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11
Q

Pseudo Stratified description

A

Ciliated cells present among mucus- secreting goblet cells

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12
Q

Transitional description

A

Changes shape in response to stretching

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13
Q

Transitional site

A

Renal pelvis, ureter, Urinary bladder

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14
Q

Transitional Function

A

Protective layer between urine & underlying tissue

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15
Q

Keratinized squamous- dead superficial layer Location and function

A

Skin
Protection against abrasion, bacterial invasion

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16
Q

Non keratinized squamous Location n function

A

Esophagus, vagina & Oral cavity
Moist & protective layer

17
Q

Pesudostratified Location n function

A

Loc: Respiratory - Trachea
function: Ciliated cells clean inspired air
Loc: Fallopian tube
Function: Transport oocytes & sperm

18
Q

Simple Columnar location and function

A

Loc: Lining of digestive organs – Stomach, Small & Large intestine
Function: Secretes mucus for stomach lining
Absorption of nutrients in small intestine

19
Q

Simple Cuboidal location and function

A

Kidney tubules, Thyroid gland

Protects ducts, transports and absorption in kidney tubules

20
Q

Simple Squamous location and function

A

Mesothelium- external surface of digestive organs, lung & heart
Endothelium- inner lining of blood vessels
Function: Filtration, transport, secretion

21
Q

Define cilia

A

are motile structures found in the uterine tubes,
uterus, and trachea

22
Q

Define Microvilli

A

are small, nonmotile projections seen in small intestine and proximal convoluted tubules in the kidney

23
Q

Define Stereocilia

A

are long, nonmotile, branched microvilli in the epididymis and vas deferens

24
Q

The function of microvilli and stereocilia is

A

absorption

25
Q

Simple squamous epithelium function

A

-Passive transport of fluids, nutrients across the thin capillary walls in endothelium of Cardiovascular system
-Gas exchange or transport across the thin-walled capillaries and alveoli in lungs.
-Filteration in kidney cortex

26
Q

Simple cuboidal epithelium function

A

-Protects ducts, transports and absorption in kidney tubules
-Thyroid gland

27
Q

Simple Columnar Epithelium are ? Give an example

A

Stomach, Small intestine, Large
Intestine(GIT)

28
Q

Pseudostratified ciliated Columnar epithelium are in which organs? Mention it’s function?

A
  • Trachea and bronchi have ciliated cells that cleanse the inspired air and transport mucus to the oral cavity for expulsion
  • Uterine tubes help the conduction of oocyte and sperm
29
Q

Stratified squamous nonkeratinized epithelium helps with?

A

-Helps to withstand increased wear and tear in the moist cavities of the esophagus, vagina, and oral cavity
-Its multilayered cells protects the surfaces of these organs.

30
Q

Stratified squamous keratizined epithelium are presented in?

A

The outermost layer of the skin

31
Q

Stratified squamous keratizined epithelium function

A

Formation of dead keratin layers
or keratinization on the skin
surface provides additional
protection from abrasion and
bacterial invasio

32
Q

The outermost layer of the skin contains dead cells and is called

A

the stratum corneum

33
Q

Transitional Epithelium function

A

❑Allows distension of the urinary organs (calyces, pelvis, ureters, bladder)
- Protective osmotic barrier between urine in the bladder &
the underlying connective tissue.

34
Q

Transitional Epithelium are capable of

A

Change in cell shape, when urine fills, the surface cells begin to flatten may
resemble stratified squamous epithelium

Histology (2 decks)

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