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Histology > Connective Tissues 2 > Flashcards

Connective Tissues 2 Flashcards

1
Q

Connective tissue types

A

1.free cells
2.fixed cells

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2
Q

Free cell types

A

1.plasma cells
2.mast cells
3.macrophage
4.leukocytes

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3
Q

Fixed cells types

A

1.mesenchymal cells
2.fibroblasts
3.fat cells

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4
Q

Mesenchymal cells (fixed cells)
(Mom of the group) structure

A

Branched cells
Pale basophilic cytoplasm

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5
Q

Mesenchymal cells function

A

Give rise to any other type of connective tissue cells
Stem cells

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6
Q

Fibroblast structure under light microscope

A

*young cells: branched with basophilic cytoplasm AND oval pale nucleus with prominent nucleolus
*old fibroblasts: flat, little pale acidophilic cytoplasm, flat or oval nucleus and prominent nucleolus

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7
Q

Fibroblast organelles (secretory cell)

A

RER
Golgi apparatus
Ribosomes
Mitochondria
Transfer and secretory vesicles

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8
Q

Fibroblast function

A

*formation of intercellular substances
1. Secrete tropocollagen (collagen fibers)
2.secretion of mucopolysacharide of the matrix
3. Secretion of elastin
4. Repair wounds

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9
Q

Fat cells structure

A

Stain: H&E stain
Appear as empty spaces + peripheral nucleus +thin rim of cytoplasm (signet ring)
Staining the fat: sudan black and osmic acid
Appears black

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10
Q

Fat cells origin

A

Fibroblasts
Mesenchymal cells

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11
Q

Plasma cells origin

A

B lymphocytes enter loose CT from the blood stream

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12
Q

Plasma cells structure

A

Spherical when free
Angular when compressed
Nucleus is eccentric with clock face heterochromatin
Cytoplasm is basophilic with pale are around the nucleus

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13
Q

Plasma calls organelles

A

RER
Free ribosomes
Golgi apparatus and a pair of centrioles
Mitochondria and secretory vesicles
Russell bodies

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14
Q

Plasma cell function

A

Secretion of antibodies

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15
Q

Mast cells origin

A

From bone marrow

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16
Q

Mast cells structure

A

Round or oval shape
Round central nucleus
Basophilic granules in the cytoplasm
Stain: toluidine blue (basic stain) metachromatic

17
Q

Mast cells organelles

A

RER
Golgi
Mitochondria
Granules
Irregular outline

18
Q

Mast cells function

A

Secrete histamine + heparin and chemical mediators

19
Q

Macrophage origin

A

Mesenchymal cells in prenatal life
Come from loose CT from the blood in postnatal life

20
Q

Macrophage structure

A

Oval shape when free
Elongated or angular when compressed
Irregular surface
Eccentric condensed indented nucleus

21
Q

Macrophage stain

A

Trypan blue

22
Q

Macrophage organelles EM

A

Phagocytose particles (phagosome)
Residual bodies
Multivesicular bodies
Lysosomes
Prominent golgi
RER

23
Q

Macrophage function

A

Phagocytosis

Histology (8 decks)

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