Circulatory System Anatomy Slideshow – Anatomy Lectures – MBBS Lectures

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: