Summary - Histology of cardiovascular system

Histology

, m
2. Histology of Heart & Vascular system

Circulatory system:
·
It is divided into 2 functional
parts :



Blood Vascular System 2
Lymph Vascular System
·
To
carry blood in both directions in the body .
"To collect lymph .




·
Consists of a continuum of blood vessels veins,
·
Blind ended lymphatic capillaries.

arteries , arterioles , capillaries , venules) & a muscular pump , Delivers it back to cardiovascular system
.




the heart .




Cardiovascular system:
A closed system that
·


begins & ends at the heart There .
are 2
groups
of blood vessels; pulmonary & systematic .




There
major types of vessels
·
are 3 : arteries , capillaries & veins
,



·
Pulmonary circulation is blood flow between
lungs & the heart .



Deoxygenated blood
goes
to the


lungs &
oxygenated blood returns back to the heart .




Systematic circulation is the movement body & diffuses into tissues.
of blood from the heart
through
·
the




Blood Vessels Structure:
Composed
·

T
of 3 Layers

1 Tunica intima 2
Tunica media
T
3 Tunica externa adventitia
N
&
-




Tunica Intima
&
Y I
&

8


~

Made up of a Endothelial Layer & a Subendothelial
1


layer .




~

Endothelial layer is simple squamous epithelium
.


~
Subendothelial layer is loose connective tissue

~

We also have a layer called the Internal elastic


Lamina that is made up of elastin & separates theTunica


intima fromTunica Media
.