Your SlideShare is downloading. ×
01 Transport System in Mammals
01 Transport System in Mammals
01 Transport System in Mammals
01 Transport System in Mammals
01 Transport System in Mammals
01 Transport System in Mammals
01 Transport System in Mammals
01 Transport System in Mammals
01 Transport System in Mammals
01 Transport System in Mammals
01 Transport System in Mammals
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

01 Transport System in Mammals

2,987

Published on

Published in: Education, Technology, Business
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
2,987
On Slideshare
0
From Embeds
0
Number of Embeds
4
Actions
Shares
0
Downloads
37
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Transport system in mammals ALBIO9700/2006JK
  • 2. Arteries, veins and capillaries ALBIO9700/2006JK
  • 3. ALBIO9700/2006JK
  • 4.  Arteries: – Transport blood swiftly and at high pressure to the tissues – Walls have 3 layer:  Inner endothelium (lining tissue) – squamous epithelium, layer very smooth and rests on elastic fibres (tunica intima)  Middle layer – smooth muscle, collagen and elastic fibres (tunica media)  Outer layer – elastic fibres and collagen fibres (tunica externa) – Distinctive characteristic: strength – Have the thickest wall – Large amounts of elastic fibres in tunica media allow the wall to stretch – Arteries further from the heart have fewer elastic fibres but more muscle fibres – Elasticity important to ‘even out’ blood flow – Branch into arterioles in tissues having greater proportion of smooth muscle. Muscles contract , narrowing the diameter and reducing blood flow. Helps to control the volume of blood flowing into tissues at different times. ALBIO9700/2006JK
  • 5.  Veins: – Capillaries join to form venules. These join to form veins. – To return blood to the heart – Pressure has dropped to very low – No need for thick walls, tunica media thinner, fewer elastic fibres and muscle fibres – Muscles squeeze inwards on the veins to raise pressure – To keep blood flowing in right direction, veins contain half-moon valves or semilunar valves ALBIO9700/2006JK
  • 6. ALBIO9700/2006JK
  • 7. ALBIO9700/2006JK
  • 8.  Capillaries: – Arterioles continue to branch into capillaries – Takes blood as close as possible to all cells, allowing rapid transfer of substances between cells and blood – Form networks throughout every tissue in body except cornea and cartilage called capillary beds – Small size, thin walls (single layer endothelial cells), tiny gaps – Pressure will have dropped ALBIO9700/2006JK
  • 9. ALBIO9700/2006JK
  • 10. ALBIO9700/2006JK
  • 11. ALBIO9700/2006JK

×