histology of cardiac muscle and blood vessels

1. Histology practical
(Histology of Cardiac muscle & Blood vessels)
By : Osama Al-Zahrani
@OSAMA_Z96

2. Cardiac Muscle fibers
* Component & Characteristics :
1- Central nucleus.
2- Intercalated disk (ICD).
3- Branched fibers.
4- Transverse striations.
* Function :
- Heart beat (Contraction).
Cardiac output (COP).
- Rhythmic contraction, no fatigue.
Branched fibers
Intercalated disk
(ICD)
Transverse
striations
Central nucleus

4. Large Elastic Artery
(Aorta - Pulmonary - Subclavian)
* Component & Characteristics :
1- Tunica Intima.
2- Tunica Media.
3- Tunica Adventitia.
4- Endothelium.
5- Subendothelium.
6- 60-80% Elasticfibers.
7- Smooth muscle fibers 20-40% .
8- Vasa Vasorum.
* Function :
- Elastic recoil in diastole to keep continuous
blood flow (2nd Heart).Vasa Vasorum

6. Fenestrated Capillary & Sinusoids
Endocrine Gland (Pituitary Gland)
* Component & Characteristics :
1- Capillary.
2- RBCs.
3- Sinusoid.
4- Fenestrations
5- Anterior pituitary cells.
* Function :
- Receiving the secreted hormones directly.
RBCs
Capillary
Sinusoid

8. Testis
* Component & Characteristics :
1- Small Artery (Thick-walled) :
- Thick tunica media.
- Thin tunica adventitia.
2- Small Vein(Thin-walled) :
- Thin tunica media.
- Thick tunica adventitia.
3- Tunica Albuginea.
4- Tunica vasculosa.
5- Seminiferous tubules.
6- Venules.
* Function :
- Conductive Arteries & Veins
Seminiferous tubules
Small Artery
Small Vein
Tunica Albuginea
Tunica
vasculosa