


MACROVASCULATURE (vessels > 0.1mm in dia)
- Large arterioles
- Muscular Arteries
- Elastic arteries
- Muscular veins
MICROVASCULATURE (visible only with microscope)
- Arterioles
- Capillaries
- Post capillary venule
CAPILLARIES
- Endothelium
- Serrated cell borders
- 2-3 nuclei
- Bulging nucleus
- Few organelles
- Tight junctions

50,000 MILES


Types of capillaries

• Intestinal mucosa
• Endocrine glands
• Choroid plexuses
• Ciliary body of eye
• Glomeruli of kidney
• Liver
• Spleen
•Bone marrow

TYPES OF CAPILLARIES

• Muscles
• Lungs
• Skin
• CNS
•Intestinal mucosa
• Endocrine glands
• Choroid plexuses
• Ciliary body of eye
• Glomeruli of kidney
•Liver
•Spleen
•Bone marrow




Gen Structural pattern of Arteries & Veins

ARTERIES








ATHEROSCLEROSIS

When tunica media of an artery is weakened by an embryonic defect, disease, or lesion, the wall of the artery may dilate extensively. As this process of dilatation progresses, it becomes ANEURYSM. Rupture of aneurysm brings severe consequences & may cause death.

VEINS

- Tunics not well defined
- Amount of muscular & elastic tissue reduced
- Proportion of C.T. components is higher
- Â Thinner walls but larger lumen

MEDIUM SIZED VEINS

LARGE VEINS (SVC & IVC)





 VENOUS VALVES



STRUCTURAL PLAN OF BLOOD VESSELS

HEART









FUNCTIONS OF ENDOTHELIAL CELLS

LYMPH CAPILLARIES

LYMPHATIC CAPILLARIES:

LYMPHATIC VESSELS:



