Histology (histology of skeletal muscle and cartilage)

histology of skeletal muscle and cartilage

1. Histology practical 1
(Histology of skeletal muscle & Cartilage)
By : Osama Al-Zahrani
@OSAMA_Z96

2. Skeletal muscle
(Striated)
* Component & Characteristics :
1-Striated muscle fibers (skeletal).
2-Transverse striation :
A -Band > Dark.
I -Band > Light.
3-Cylindrical fibers.
4-Peripheral nuclei.
5-Connective tissue fibroblasts.
Peripheral nuclei
Striated muscle
fibers (skeletal)
Connective tissue fibroblasts
Transverse striation
A -band
( dark = Myosin + Actin)
I -band
( Light = Actin only)

4. Skeletal muscle
* Component & Characteristics :
1-L.S. Skeletal muscle fibers.
2-T.S. Skeletal muscle fibers.
3-Striated.
4-Peripheral nuclei.
5-Fused myoblasts (syncytium).
6-Multinuclei.
* Function :
-Strong and sustained contraction.
-Red fibers : Small diameter, not easily fatigued, slow.
-White fibers : Big diameter, easily fatigued, fast
T.S. Skeletal muscle fibers
L.S. Skeletal muscle fibers

6. Hyaline Cartilage in Trachea (Windpipe)
(Elective single)
* Component & Characteristics :
1-Hyaline cartilage.
2-Cell nest (isogenous).
3-Hyaline matrix.
4-Fibrocartilaginous layer.
5-Tracheal muscle: (Posterior to give space for the esophagus).
6-Perichondrium : (Collagen fibers, Fibroblasts, Chondrogeniccells).
7-Tracheal gland (Mocu-serous).
8-Mucosa.
9-Submucosa.
10-Fibrosa.
11-Respiratory epithelium :
(Pseudostratified columnar ciliated + Goblet calls.)
* Function :
Hyaline cartilage :
-Keep the airway patent.
-Protect the vital organ and allow movement.
Trachea :
-Air conditioning, conduction, and cleaning (filtration).
Respiratory epithelium
Mucosa
Submucosa
Goblet cells
Hyaline cartilage
Hyaline matrix
Perichondrium

8. Elastic Cartilage
( Ear Pinna)
Silver stain (Dark brown -Black)
* Component & Characteristics :
1-Perichondrium
(Collagen fibers + Fibroblast + chondrogeniccells).
2-Chondroblast(Spindle shape).
3-Chondrocyte (Rounded or hemispherical).
4-Elastic fibers.
5-Cell nest (Isogenous).
* Function :
Firm bendable elastic tissue.
Chondrocyte
Cell nest (Isogenous)
Chondroblast
Elastic fibers
Perichondrium
Perichondrium