Lymphatic System

Question 1

What are the three major extracellular fluids of the lymphatic system?

Answer 1

1 - Blood plasma
2 - Interstitial fluid - b cells
3 - Lymph - in lymphatic vessels

Question 2

Right lymphatic duct

Answer 2

from right head, chest, arm

- drains into the right subclavian vein re-entering blood circulation

Question 3

Thoracic Duct

Answer 3

from below ribs and left side of body

• below ribs coverage goes to an enlarged vessel called the cisterna chyli
• thoracic duct drains blood into left subclavian vein to re-enter blood circulation

Question 4

List the passage of the lymphatic system.

Answer 4

Lymphatic capillaries - Lymphatic collecting vessels (valves) - lymphatic ducts - subclavian veins

Question 5

Name the primary lymphatic organs and their purposes.

Answer 5

1. Red bone marrow
   - lymphoid stem cells arise here in fetus
   - if remain here they become B lymphocytes and if they leave they become T lymphocytes (Thymus gland)
2. Thymus gland
   - T lymphocytes proliferate from mitosis and mature

Question 6

Name the secondary lymphatic organs and their pruposes.

Answer 6

1. Lymph nodes
   - cervical, axillary, inguinal, intestinal, pelvic
2. Spleen
   - filters blood, eg. removes bacteria
3. Mucosal Associated Lymphoid Tissue
   - eg. tonsils, appendix, lymphoid tissues in mucous membranes
   - tonsils: a) adenoids (1) pharyngeal nasopharynx
   b) palatine (2) in oropharynx
   c) lingual (1) base of posterior part of tongue.