Properties of blood vessels in detail and medical physics related

1. PROPERTIES OF VESSEL WALLS
 Made By:
MEMON AYAN
MEMON RAIYAN
MODHAVA SAHEL
MIRZA NAADIR
 GUIDED BY: Professor LEVANI LOMIDZE

2. BLOOD VESSELS
 There are three main types of blood vessels
• Arteries
• Veins
• Capillaries

4. WHAT IS THE TOTAL LENGTH OF BLOOD
VESSELS?
• Make a guess at the total length, in kilometers,
of all the blood vessels in an adult human.
• 100,100 Kilometers
• That’s more than twice the distance
around the Earth at the equator!

6. DO ALL BLOOD VESSELS CARRY THE SAME
TYPE
OF BLOOD ?

7. BLOOD VESSELS
 ARTERIES
• Carry blood away from the heart
• Thick muscular walls
• Lots of elastic tissue in wall
• Relatively small lumen
• Blood under high pressure
• Blood flow rapid
• Blood flows in pulses
• No valves

9. ARTERIES
• The elastic tissue in the artery wall allows the vessel to ‘give’ as blood surges
through.
• So, the artery wall first stretches as a result of the high blood pressure, before an
elastic recoil of the wall pushes the blood on its way.
• This swelling can be felt as a pulse where arteries travel near the skin surface.

10. BLOOD VESSELS
 VEINS
• Carry blood back to the heart
• Thin muscular walls
• Little elastic tissue in the wall
• Relatively large lumen
• Blood under low pressure
• Blood flow is slow
• No pulse
• Valves prevent backflow of blood

12. VEINS
How the semi-lunar valve
works in a vein:
• The blood has just enough
pressure to force the valve
open as it flows towards
the heart
• Backflow of blood causes
the valves to close

13. BLOOD VESSELS
 CAPILLARIES
• Link up arteries and veins in the tissues
• No muscle
• Wall made up of one cell thick endothelium
• Small lumen – just large enough for a red blood cell to squeeze through
• Pressure falls as blood passes along capillary
• Blood flowing is slowing down
• No pulse
• No valves

15. COMPARING CROSS-SECTIONS
 Compare the cross section of Vein and an Artery.
• Veins do not need to keep blood flowing quickly at high pressure and so they have
much thinner walls than arteries.

16. REFERENCES
• Health & Medicine, Business
• Google Images
www.ths.tolland.k12.ct.us
www.kgmu.org