BIOL 1410 Lecture Notes - Lecture 13: Cisterna Chyli, Subclavian Vein, Thoracic Duct
1 May 2018
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TOPIC 13: LYMPHATIC SYSTEM
A) Overview
includes: figurer 20.2?
o lymph vessels + organs
o T & B lymphocytes
protect body against bacteria, viruses, cancer cells
B) Major Extracellular Fluids
1) blood plasma plasma = depends on its location
fluid in blood
2) ISF (interstitial fluid) as it leaks out
bathes cells (except blood cells)
3) Lymph
inside lymphatic vessels
C) Lymphatic Circulation figure 20.2
ISF (Interstitial Fluid) – formed by capillaries leaking plasma – leaky capillaries
o 90% re-enters blood in capillaries + venules
o 10% into lymphatic circulation (now called lymph)
Lymph
o enters lymphatic capillaries (closed ended vessels)
o lymphatic capillaries connect to lymphatic collecting vessels (have valves)
lymph nodes along vessels filter lymph (bacteria, debris)
transport lymph fluid AWAY from tissues to:
1) Right lymphatic duct (lymph from Right head, chest, + arm)
drains into right subclavian vein reentering circulation
2) Thoracic duct (lymph from below ribs + Left body)
collecting vessels from below the ribs converge to an enlarged
lymph vessel = cisterna chyli (the beginning of the thoracic duct)
thoracic duct drains into L. subclavian vein reentering blood circ.
Summary – one way route back to blood: figure 20.1
Lymph only goes
towards the heart
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Document Summary
Topic 13: lymphatic system: overview includes: figurer 20. 2? lymph vessels + organs, t & b lymphocytes. Protect body against bacteria, viruses, cancer cells: major extracellular fluids, blood plasma plasma = depends on its location fluid in blood, isf (interstitial fluid) as it leaks out. Bathes cells (except blood cells: lymph inside lymphatic vessels, lymphatic circulation figure 20. 2. Isf (interstitial fluid) formed by capillaries leaking plasma (cid:862)leaky capillaries(cid:863: 90% re-enters blood in capillaries + venules, 10% into lymphatic circulation (now called lymph) Lymph: enters lymphatic capillaries (closed ended vessels) lymphatic capillaries connect to lymphatic collecting vessels (have valves) Lymph nodes along vessels filter lymph (bacteria, debris) Transport lymph fluid away from tissues to: right lymphatic duct (lymph from right head, chest, + arm) Drains into right subclavian vein reentering circulation: thoracic duct (lymph from below ribs + left body) Collecting vessels from below the ribs converge to an enlarged lymph vessel = cisterna chyli (the beginning of the thoracic duct)
