Histology of Tissues and Types of Tissues.ppt

Histolgy of Tissues
Types of Tissues

1. HISTOLOGY
Four Basic Types of Tissue
1.Epithelial
2.Connective
3.Muscle
4.Nerve
Thanks to Pam Brannock (USC Biology,Hilbish Lab)
for creating this PowerPoint

2. EPITHELIAL TISSUE
 Cells are bound tightly together
 Little extracellular material
 Arranged in sheets
Cover internal and external surfaces
Often control passage of material
Classified by shape of cells and number of layers
Pg 154-155; slides 157-158

3. EPITHELIAL TISSUE
CELL SHAPE
Squamous shape
Thin, flat cells
Look like fried eggs
 Cubodial shape
square shape- cross section
6sided polygon- surface
 Columnar
Rectangular- cross section
Polygonal- surface view
CELL NUMBER
Simple
Single layer
 Stratified
2+ layers
 Pseudostratified
Appear stratified- but not
Transitional
Change shape

4. EPITHELIAL TISSUE
SIMPLE SQUAMOUS
Single layer
Squamous shape
Lining of body cavity, lungs,
blood vessels

5. EPITHELIAL TISSUE
SIMPLE CUBOIDAL
Single layer
Cuboidal shaped
Kidney tubules, glands

6. EPITHELIAL TISSUE
SIMPLE COLUMNAR
Single layer
Columnar shape
Lining of digestive tract
Modified by presence of cilia

7. EPITHELIAL TISSUE
STRATIFIED SQUAMOUS
Multi layer
Outer most layer- squamous cells
Inner- cuboidal or columnar
Lining of mouth, esophagus, skin

8. EPITHELIAL TISSUE
PSEUDOSTRATIFIED
COLUMNAR
One layer
Appears stratified
Respiratory tract

9. CONNECTIVE TISSUE
 Abundant extracellular material
Matix (dominant part)
Fiber, cells in liquid, gel, or solid matrix
 Function
Bind and/or support other tissue
Pg 154, 156, 159; slides 158-161

10. CONNECTIVE TISSUE
CONNECTIVE TISSUE PROPER
Matrix consist of fibers
Loose or areola
Few fibers
Delicate arrangement
Fibrous
Ex. Tendons
Abundant, well organized
fiber

11. CONNECTIVE TISSUE
ADIPOSE TISSUE
Loose connective
Store large droplets of fat
BLOOD
Lymph
Liquid matrix
Sometimes in different category
RBC- Red Blood Cells
WBC- White Blood Cells

12. CONNECTIVE TISSUE
CARTILAGE
Chondrocytes
Small cavities- lacunae
Rubbery consistency (matrix)
Ear, nose

13. CONNECTIVE TISSUE
BONE
Osteocytes
Small cavities- lacunae
Hardest CT
Impregnated w/ calcium salts
Spongy
Loose rods of bones
Ends of arms and legs
Compact
Shafts of long bones
Tightly organized

14. MUSCLE TISSUE
 Cells have ability to contract
Function
Locomotion
Other body movement
Pg 156-157,162; slides 161

15. MUSCLE TISSUE
SKELETAL
Voluntary movement
Long and cylindrical
Transverse striation
Each fiber is multi-nuclear

16. MUSCLE TISSUE
SMOOTH
Involuntary movement
Predominant
Long, spindle shape
Single nucleus
Internal organs

17. MUSCLE TISSUE
CARDIAC
Striations
Involuntary
One nucleus
Deep center
Heart muscle

18. NERVE TISSUE
 Cells very high ability to
Respond to stimuli
Transmit impulses
Pg 157, 163; slides 161

19. NERVE TISSUE
NEURON
Cell Body(3)
Dendrites (5)
Axon(1)