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Comparison Between various Types of Acini (Serous and Mucous Acini comparison)

 

Parameter

 

serous acinus

 

Mucous acinus

Size of acinus (diameter)

Small

Large

Lumen of acinus

Narrow

Wide

Number of cells/acinus

5-8

> 8

size of cell

High cuboidal (pyramidal) or columnar

Cuboidal or iow columnar

Cell's lateral boundaries (due to secretory canallcull at cell boundaries)

Not clear (due to many canaliculi)

»

Clear (due to less canaliculi)

Shape of nucleus

Rounded

Flattened or oval (but when empty, the nucleus is rounded)

Position of nucleus

Central

Basal

Basal striations In cytoplasm

Basophilic

Less basophilic (rich in glycoproteins and appears vacuolated due to removal of dissolved mucous)

Supranuclear cytoplasm

Many zymogen granules (electron- dense)

Many more mucinogen granules (electron-lucent)

Myoepltheilocytes

Basket cells and less in number

Spindle-shaped cells and more in number

secretion

Serous fluid (watery) rich in enzymes

Mucous fluid (thick or viscid) rich in glycoproteins

Apical microvilli

Present but Irregular

Absent

Amylase activity

Less

More

comparison Between various Types of Acini

 

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