2. Students should be able to describe microscopic
features & their sites of various cells and tissues present
in our body.
To identify the cells present in blood and their functions.
7. Classification
Depending on Number of layers
•One- simple
•Two or more- stratified
Depending on Shape of cell
•Irregular, flat- squamous
•Square-like- cuboidal
•Column-shaped- columnar
10. Found where filtration or exchange is occuring like
in circulatory system.
Lines blood and Lymph vessels)
The serous linings of pericardium, pleura and
peritonium.
17. This epitheium gives errorenous impression that
there is one more layer of cells.
The nuclei of these cells are disposed at different
level.
Cilia are never present on true stratified
epithelium.
19. cells are flat or shield like
PROTECTS from Exposure to friction
This epithelium found at surface of skin,
pharynx,linining of the mouth, oesophagus,anal
canal and vagina.
22. Is a Stratified epithelium which contains cells that,
due to stretching, change their shape, hence the
name “TRANSITIONAL”.
Also known as urothelium .
Found in urinary tract.
23. This properties allows for liquid to be store i.e.
urine in the bladder ( an organ where this tissue is
found)
The apical cells are rounded and give an umbrella
shaped or dome cells.
The basal cells are roughly cuboidal.
Intermediate cells are polygonal.
24.
25.
26. GLANDULAR EPITHELIA
A gland is one or more cells which produce and
secrete a product called secretion.
27. Characteristic of the lining of the gastrointestinal tract.
Glands that have this epithelium are
1.Exocrine gland: these glands secrete their products
into a system of channels or that convey the product to
its final destination. E.g salivary gland.
2.Endocrine gland:secrete their products or hormones
into the underlying connective tissue and release their
secretion directly into the blood. E.g thyroid gland.
28.
29. 1.STRATIFIED SQUAMOUS - skin,oral
cavity,oesophagus,vagina etc.
2.GLANDULAR - GIT,pancreas,salivary
gland,endocervix,endometrium,thyroid etc.
3.TRANSITIONAL - urinary
bladder,ureter,pelvis of kidney etc.
31. These maintain the integrity of supporting tissues
by continuous slow turnover of the extracellular
matrix constituents.
Fibroblasts synthesize and secrete collagen
molecules then assembles into fibrils that are
cross linked into fibres in the extracellular matrix.
32. Most numerous cells of connective tissue.
Concerned with the production of collagen fibres.
Collagen fibres provides strength.
Also produce reticular and elastic fibres.
In tissue sections appear to be spindle shaped
and nucleus is flattened.
Show branching processes when seen from
surface.
34. Cells which are adapted for storage of fat called
as adipocytes.
Adipose tissue has important role general
metabolic process.
Two main types:
1.White adipose tissue : found in deep layers of
skin. E.g adults
2.Brown adipose tissue: small amount found in
humans. E.g children
35. Nutrition
Mechanical function , keeps them in position.
Cushioning effect.
Insulation
Heat generator.
39. It is composed of elongated,multinucleate
contractile cells k/s muscle fibres bound together
by collagenous supporting tissue.
Muscle is made up of numerous small fasciculi.
Each muscle fibre has multiple nuclei arranged at
the cell periphery.
40.
41. Cells are elongated,spindle shaped cells with
tapered ends.
Nucleus is centrally located in the cytoplasm at
the widest part of the cell.
Smf are bound together in irrerular,branching
fasciculi, and these fasciculi are functional
contractile unit.
44. 14-15 µm in size
Nucleus deep purple
Cytoplasm pink
Small n specific granules
Life span is 1-2 days
45.
46. Two types
1. Small – 7-10µm
2. Large - 10- 15µm
Nucleus is round to oval
Cytoplasm basophillic
47.
48. Size more then polymorphonuclear cell
Nucleus bilobed mostly
Cytoplasm large
bright orange red granules,
49.
50. Usually not present in peripheral blood
Occur in the marrow
Have deeply basophillic cytoplasm with a
perinuclear hallow.
Eccentric nucleus
51. Derived from B lymphocyte and clearly designed
for synthesis of Igs.
Cartwheel nucleus.
They are found in –
Chronic infections
neoplasm
allergic states , etc
52.
53. 20 -70µm in size
Irregular shape
Cytoplasm may have vacuoles,cell debris or
hemosiderin
Abundant cytoplasm and small nuclei
