Lymphatic System (Wk 13 - Exam 4) Flashcards
What’s the key difference between the secondary and primary lymphoid organs?
Primary = Where Lymphocytes mature (grow) and proliferate (increase quickly)
Secondary = Adaptive immune response
What are Primary lymphoid organs?
Locations where lymphocytes go through maturation and increase quickly (proliferate).
What is Red bone marrow?
Loose connective tissue where blood cells are made.
- B cells increase quickly and develop
What is Thymus?
- Specialized organ that’s on top of the Heart
- T cells mature and increase rapidly
- Its size decreases, once the person gets older.
What are Secondary lymphoid organs?
Locations that are for adaptive immune responses
What are Lymph nodes?
Organs beside the lymphatic vessels, which are shaped like beans
Function of Lymph nodes
Gets rid of debris & pathogens
What is the Spleen and its functions?
An organ that filters blood-borne pathogens & gets rid of old blood cells
- In the Left Upper Quadrant of Abdominal Region
What does the Primary lymphoid organs include?
Thymus and Red bone marrow
What do Secondary Lymphoid organs include?
Spleen, Lymph nodes, Tonsils, Mucosa-associated lymphoid tissue, Bronchus-associated lymphoid tissue, and Adenoids.
What are Tonsils?
Lymphoid nodules in pharynx that find pathogens in air and food.
- palatine, lingual, and pharyngeal
What is Mucosa-associated lymphoid tissue?
Connected with mucous membranes (breast tissue, eyes, and digestive tract)
What is Bronchus-associated lymphoid tissue and its function?
- Connected (associated) with respiratory tract
- Gives response to inhaled substances
What is the Lymphatic system?
“A network of vessels that carry fluid towards the heart
─ lymph is fluid from body tissues
─ chyle is lipid-rich lymph from intestines”
What are the Lymphatic system’s main tasks?
- Returns body fluids to blood
- Transfers immune cells
- Transfers chyle
