Lymphatics

Question 1

Lymph

Answer 1

Fluid connective tissue, made up of water, proteins and dissolved electrolytes.

Question 2

Lymphatic vessels

Answer 2

• The pathway of lymph forming
• Have more valves then blood vessels
• Muscle contractions

Question 3

Drainage of the lymph

Answer 3

Vessels unite to form 2 thoracic ducts (right and left ducts)
- Left duct: Drains the right hand side of the body including arm, upper chest, right side of the head
- Right duct: drains the rest of the body

Question 4

Primary lymphatic organs: Red Bone Marrow

Answer 4

Found in: flat bones and at the end of long bones
Contains: haemopoietic stem cells (from these cells we get all our RBCs, platelets and all of the WBCs within the body)

Produce and mature B cells and make pre-T cells (lymphocytes)

Question 5

Primary lymphatic organs: Thymus gland

Answer 5

Found in: mediastinum (on top of the heart)
- Shrinks after puberty
Purpose: T cells mature here (become fully developed and can start to fight off viruses and cancer cells)
- Thymus makes thymosin hormones for development and maturation of T cells

Question 6

Lymph nodes

Answer 6

Purpose: Filter the lymph that is coming through from lymphatic vessels
- Afferent vessels bring lymph into node
- Efferent vessels leaves node with cleaner lymph
Found: in clusters throughout the body along lymphatic vessels

Question 7

Spleen

Answer 7

Found: between stomach and diaphragm
Purpose: Similar to lymph nodes but it filters blood, therefore as blood moves through the spleen, macrophages remove worn-out or defective RBCs, WBCs and platelets and recyles them for further use.

Stores and release blood and blood cells

Question 8

MALT (Mucosa-associated in connective tissue layer in the mucous membranes)

Answer 8

Nodules scattered in connective tissue layer in the mucous membranes.
Example: Appendix and tonsils