18_Lymphatic and Immune

18_Lymphatic and Immune - LYMPHATIC & IMMUNE SYSTEMS...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 24
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Lymphatic System Blood pressure pushes plasma from the blood into the interstitial spaces around the cells Called interstitial fluid Most of the fluid is reabsorbed at the venous end, but about three liters a day is not The lymphatic system functions to return this fluid to the blood stream Called lymph Plasma (in blood vessels) Interstitial fluid (in between cells) Lymph (in lymph vessels)
Background image of page 2
Functions Returns leaked plasma to the bloodstream Lymphatic vessels transport dietary lipids Lymphatic organs house lymphocytes Generates an immune response and increases the lymphocyte population
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Lymph and Lymph Vessels Lymph vessels return lymph to the venous bloodstream Lymphatic capillaries Pick up interstitial fluid (leaked plasma) Fluid is called lymph when it enters the capillaries Lymphatic vessels Lymphatic trunks Lymphatic ducts Empty lymph back into venous circulation
Background image of page 4
Lymph Capillaries Close-ended tubes Overlapping endothelial cells form one-way flaps Occur most everywhere blood capillaries occur Absent from red bone marrow, CNS, and avascular tissues Lacteals (special types of lymphatic capillaries) Pick up interstitial fluid, dietary lipids, and lipid- soluble vitamins GI lymph is called chyle
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Lymphatic Vessels Receive the lymph from the capillaries Resemble small veins Three tunics Valves Valves prevent backflow in the low pressure system Two types: Afferent: flow towards lymph nodes Efferent: flow away from lymph nodes
Background image of page 6
Lymphatic Trunks Drain lymph from major body regions Jugular, Subclavian, Bronchomediastinal, Intestinal, Lumbar
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Lymphatic Ducts Thoracic duct
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/06/2011 for the course PDBIO 220 taught by Professor Tomco during the Winter '09 term at BYU.

Page1 / 25

18_Lymphatic and Immune - LYMPHATIC & IMMUNE SYSTEMS...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online