4D- The Lymphatic System

what makes up the lymphatic system

• organs, vessels and lymph fluid (similar to interstitial fluid)

• organ involved

  • red blood marrow

  • thymus

  • spleen

• lymph nodes

• diffuse lymphatic tissue

  • tonsils

what are the primary lymphatic organs and what do they do

• provide environment for the maturation of B and T lymphocytes

  • the nursery

• red blood marrow

  • matures B cells

• thymus

  • matures T cells

what are the secondary lymphatic organs and tissues and what are their purpose

• site where most immune responses occur

• produce antibodies

• B and T cells become active in the…

  • spleen

  • lymph nodes

  • blood stream

what are the functions of the lymphatic system

1. draining excess interstitial fluid and plasma proteins from tissue spaces

2. transporting dietary lipids and vitamins from GI tract to the blood

3. facilitating immune responses

• recognize microbes or abnormal cels and responding by killing them or secreting antibodies to destroy them

what happens during the formation and flow of lymph

• fluid and proteins escaping from vascular capillaries is collected by lymphatic capillaries and returned to the blood

• respiratory and muscular pumps promote flow of lymphatic fluid

• lymphatic vessels empty into subclavian veins using valves

name this part of the flow of lymph and blood

lymph node

name this part of the flow of lymph and blood

lymphatic duct

name this part of the flow of lymph and blood

subclavian vein

name this part of the flow of lymph and blood

lymphatic vessel

name this part of the flow of lymph and blood

valve

name this part of the flow of lymph and blood

veins

name this part of the flow of lymph and blood

lymphatic capillaries

name this part of the flow of lymph and blood

systemic blood capillaries

name this part of the flow of lymph and blood

heart

name this part of the flow of lymph and blood

arteries

name this part of the flow of lymph and blood

pulmonary blood capillaries

which duct is the area in green drained by

thoracic duct

which duct is the area in orange drained by

right lymphatic duct

what is the order of the passage of lymph

1. arteries and blood capillaries (blood)

2. interstitial spaces (interstitial fluid)

3. lymph capillaries (lymph)

4. lymphatic vessels

5. lymph trunks

6. the thoracic duct or the right lymphatic duct

7. the subclavian veins (blood)

what are the parts of the passage of lymph that screens the blood

• interstitial spaces (interstitial fluid)

• lymph capillaries (lymph)

• lymphatic vessels

• lymph trunks

• the thoracic duct or the right lymphatic duct

how does lymph flow

• skeletal muscle contractions and respiratory movements cause a ‘milking’ action

• lymphatic vessel valves prevent backflow

what is an obstruction/ excessive accumulation of interstitial fluid called

lymphedema

name this part of lymphatic flow

venule

name this part of lymphatic flow

tissue cell

name this part of lymphatic flow

interstitial fluid

name this part of lymphatic flow

lymphatic capillary

name this part of lymphatic flow

arteriole

name this part of lymphatic flow

blood capillary

what causes lymphedema

• too much pressure pushing out of the blood/lymph

• not enough pressure going into the blood/lymph