Histology Department

CYTOLOGY for DENTISTRY (Practical)

Histology Department

Practical Exam (45 Marks/3 Exams)

A. Identify the structure in the photo (0.5 mark).

B. Mention one function, site, special stain, special feature,……. (0.5 mark).

Histology Department THE CELL

It Is the structural & functional unit of all living tissues.

Cells have different shapes & sizes.

THE CELL is made of:

1- Nucleus

2- Cytoplasm

Histology Department CYTOPLASMIC ORGANELLES

A. Membranous:

1. Cell membrane.

2. Mitochondria.

3. Endoplasmic reticulum (rough & smooth).

4. Golgi apparatus.

5. Lysosomes.

B. Non-membranous:

1. Ribosomes.

2. Centrioles.

3. Cilia & Flagella.

4. Cytoskeleton (actin, intermediate filaments & microtubules).

Histology Department

MEMBRANOUS ORGANELLES

Histology Department

EM Photomicrograph of Cell Membrane (Two adjacent cell membranes)

Histology Department

EM Photomicrograph of Rough Endoplasmic Reticulum

Histology Department

EM Photomicrograph of Smooth Endoplasmic Reticulum

Histology Department

EM Photomicrograph of Mitochondria

Histology Department

EM Photomicrograph of Golgi Complex

Histology Department

EM Photomicrograph of Lysosome (Primary & Secondary)

Histology Department

NON-MEMBRANOUS ORGANELLES

Histology Department

EM Photomicrograph of T.S. & L.S. of Centrioles

Histology Department

EM Photomicrograph of Ribosomes and Polyribosomes

Histology Department

EM Photomicrograph of Cytoskeleton

Histology Department

EM Photomicrograph of L.S. and T.S in CILIA

Histology Department

EM Photomicrograph of Microvilli

Histology Department

EM Photomicrograph of Euochromatic Nucleus

Euochromatin

Heterochromatin

Nucleolus

Histology Department

EM Photomicrograph of Heterochromatic Nucleus

Heterochromatin

Euochromatin

Histology Department

INCLUSIONS

Histology Department

LM Photomicrograph of glycogen granules in liver cells stained with Best’s carmine (red)

Histology Department

LM Photomicrograph of glycogen granules in liver cells stained with PAS (magenta red)

Histology Department

LM Photomicrograph of dissolved fat globules in fat cells stained with H&E

Histology Department

LM Photomicrograph of fat globules in fat cells stained with Sudan III (orange)

Histology Department

LM Photomicrograph of lipofuscin pigment in nerve cell

Histology Department

LM Photomicrograph of lipofuscin pigment in cardiac (heart) muscle cells

Histology Department

LM Photomicrograph of melanin pigment in skin cells

Histology Department

LM Photomicrograph of carbon pigment in the lung

Histology Department

LM Photomicrograph of tattoo pigment in the skin

Histology Department

THANK YOU