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
- 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:
