Lymphatics

Question 1

Lymphatic development occurs during _ week of gestation and has significant presence by _ weeks.

Answer 1

4th week

20 weeks

Question 2

Mesoderm becomes…

Endoderm becomes…

Answer 2

.. lymphatic vessels, nodes, spleen and myeloid tissue

… thymus and part of tonsils

Question 3

When does the immune system mature?

Answer 3

puberty

Question 4

Function of lymphatics?

Answer 4

the clear extracellular spaces of toxins, excess proteins, bacteria, and viruses etc. and bringing them to lymphnodes for immune function
Also carries chylomicrons for fat absorption by the body and returns proteins to vasculature

Question 5

What is lymph fluid composed of?

Answer 5

immune cells, foreign antigens, bacteria/viruses, clotting factors, and post-prandial chylomicrons

Question 6

Tissues that do NOT have lymphatic vessels

Answer 6

epidermis, endomysium of muscle, cartilage, and bone marrow