Lecture 3.1: Introduction to The Immune System, Lymphatic System Flashcards
1. List the functions and structures of the lymphatic system 2. Describe the structure and function of lymphatic capillaries and vessels and explain how the lymph capillaries drain excess ISF and return it to the systemic circulation.
Collection of organs, tissues, and cells that help the body respond to pathogens
Lymphatic & Immune Systems
- Where our body commonly responds to pathogens
- Organs + tissues + cells + vessels
Lymphatic system
- How our body responds to pathogens
- Cellular response commonly within the lymphatic system
Immune system
What are the functions of the Lymphatic system?
- Fluid balance
- Transport dietary fats
- Mediate immune responses
What are the PRIMARY Lymphatic organs?
- Red bone marrow
- Thymus
What are the SECONDARY Lymphatic organs?
- Lymph nodes
- Spleen
- Lymphatic nodules/follicles
What are the components of the lymphatic system?
- Primary & Secondary Lymph Organs
- Lymph Vessels
Clear, mostly colorless fluid
- Similar to plasma but without the RBCs or plasma proteins
- Consistency varies based on location and activity
Lymph
Lymph after a meal, absorb lipids from food -> milky appearance
location
Small intestine
Lymph has a large increase in lymphocyte number after lymph nodes as they re-enter circulation
location
Lymph nodes
Microcirculation
0.5% of plasma filters at arterial end -> 85% of that 0.5% is reabsorbed at venous end.
- Where does the other 15%
go?
To the Lymphatic System
