Cytology2 prelab

• 1. Nucleus & RER (EM).

• 2. Nuclear pore & rER continuous with the outer nuclear membrane(EM).

• 3. Melanin pigment in negroid skin(LM)

• 4. Glycogen granules in liver. (LM)

• 5. lipid droplet.(EM)

Nucleus

NUCLEUS..

• Nuclear envelope.

• Chromatin.

• Nucleolus.

• Nucleoplasm.

• Nuclear pores.

• RER

Nucleus & rER

Two parallel nuclear membrane

Nuclear pore

Nuclear pore & rER continuous with the outer nuclear membrane

Nuclear pore & rER continuous with the outer nuclear

membrane

Melanin pigment in negroidskin(LM)

a. Dark brown pigment.

b. In the epidermis of skin.

E/M of Glycogen granules

• One of the cell inclusions.

• Has a rosette appearance.

• Found in liver cells.

Glycogen granules in liver

Glycogen granules in liver(L/M)

a. Red granules

b. Found in Liver cells

E/M of lipid droplet:

• 1. One of the cell inclusions

• 2. Electron dense ( dark) and homogenous in appearance.

• 3. Variable in size.

Lipid droplet