16. Simple Squamous Epithelium
• flattened cells
• Oval and large nucleus
• Bulging of cell surface due to large nucleus
• Eg. Lines the:
alveoli of lungs,
the free surfaces of peritoneum,
pleura and
pericardium
blood vessels (endothelium)
heart (endocardium) (mesothelium)
17. Simple cuboidal Epithelium
• like squares or cuboid
• Nuclei is rounded and centrally placed.
• lines the:
follicles of thyroid gland,
kidney tubules,
germinal layer of ovary and
ducts of various glands .
18. Simple Columnar Epithelium
• Height >width .
• nuclei are oval & elongated toward the basement
membrane.
• lines the
mucous membrane of the stomach
large intestine
Some part of bronchioles
Uterine tube
20. Columnar Epithelium Striated Border
• vertical striations on free surface.
• Brush border
• Electronic view: microvilli
• Non motile
• typically seen in small intestine.
22. Pseudo stratified Epithelium
• appears to be multi-layered but actually there is
only one layer of cells.
• Cell of different height
• position of nucleus at different levels
• bears hair like projections called cilia.
• Mostly seen in trachea and
large bronchi .
23. Pseudo Stratified Columnar Epithelium
(With Stereocilia)
• Stereocilia as seen in epididymis .
• Stereocilia are actually long microvilli and not cilia.
24. Stratified Squamous Epithelium
(Non–Keratinised )
• only the most superficial cells are flattened .
• deepest are columnar
• middle layers they are polyhedral,
• while the more superficial layers show increasing
degrees of flattening .
• no superficial keratinized zone ; flattened cells
are seen in topmost layer .
• lining some internal organs like
Oesophagus,
Cornea, Tongue and the vagina .
28. Transitional Epithelium
• Have several layers of cells with round nuclei.
• The deepest cells are columnar or cuboidal.
• The middle layers are made up of polyhedral or pear-
shaped cells.
• Superficial layer shaped as
umbrella.
• These are mostly found in
urinary tract.
