Types of Tissue

• Epithelial Tissue • Connective Tissue • Muscle Tissue • Nervous Tissue

1

Properties of Epithelia

• Cellularity • Polarity • Avascularity • Regeneration

2

Cuboidal epithelium

Simple columnar epithelium

Simple squamous epithelium

Pseudostratified columnar epithelium

Stratified squamous epithelium

Epithelial Tissue

3

Apical surface

Basal surface Basal lamina

40 µ

m

Polarity of epithelia

4

5

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Squamous Cuboidal Columnar

Simple

(a)   Classes of epithelium

Pseudostratified columnar

Stratified

(b)  Cell shapes

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7 8

9 10

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13 14

15

Constituents of Connective Tissues 1.  Cells

A. Blasts B. Cytes C. Clasts

2.  Extracellular Matrix A. Ground Substance B. Fibers

I.  Collagenous II.  Elastic III. Reticular

16

Blood

Connective Tissue

Plasma White blood cells

55 µ

m

Red blood cells Cartilage

Chondrocytes

Chondroitin sulfate

100 µ

m

Adipose tissue

Fat droplets

150 µ

m

Bone

Central canal

Osteon

700 µ

m

Nuclei

Fibrous connective tissue

Elastic fiber

30 µ

m

120 µ

m

Collagenous fiber

Loose connective tissue

17 18

19 20

21 22

23 24

25 26

27 28

29 30

31 32

33

Muscle Tissue

Skeletal muscle Nuclei

Muscle fiber Sarcomere

100 µm

Smooth muscle Cardiac muscle

Nucleus Muscle fibers 25 µm Nucleus Intercalated disk 50 µm

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35 36

37 38

Nervous Tissue

Neurons

Neuron: Dendrites

Cell body

Axon

(Fluorescent LM)

40 µ

m

Glia Glia

Axons of neurons

Blood vessel

(Confocal LM)

15 µm

39 40

41