Question

1.​Distinguish the lymphatic system from the immune system.

​2.​Describe the structure and distribution of lymphatic vessels.

​3.​Explain how lymph forms, and describe the mechanisms by which it is transported.

​4.​List and explain the important functions of the lymphatic vessels.

​5.​Describe how lymph nodes function as lymphatic organs. Describe the path of lymph through a node.

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Answer 1

1. Lymphatic system is the network of the vessels by which the lymph go back to the blood while immune system is the organ and the reactions of the body which provides resistance to infections and toxins.

Lymphatic system is connected to circulation system while immune system is connected to endocrine system and nervous syemtem.

Lymphatic system is the component of immune system and immune system defend the body against pathogens.

Lymphatic system consists of lymph, lymph nodes, lymph vessels and organs such as thymus, spleen and tonsils while immune system is the functional system.

4. Important functions of lymphatic vessels which are:

It is a network of tissues and organs that help rid the body of toxins, waste and other unwanted materials.

The main function of the lymphatic system is to transport lymph, a fluid containing infection-fighting white blood cells, throughout the body.

lymphatic system plays a important role in fluid balance and absorption.

It transports white blood cells to and from the lymph nodes into the bones

The lymph transports antigen-presenting cells, such as dendritic cells, to the lymph nodes where an immune response is stimulated.

3.The interstitial fluid, which is the precursor of the prenodal lymph, is formed as an ultrafiltrate of capillary microcirculation; as such many of the proteins found in the blood are present in the lymph as well.  Interstitial fluid - the fluid which is between the cells in all body tissues - enters the lymph capillaries. ...Lymph returns proteins and excess interstitial fluid to the bloodstream. Lymph also transports fats from the digestive system (beginning in the lacteals) to the blood via chylomicrons.

5. The lymphatic system is commonly divided into the primary lymphoid organs, which are the sites of B and T cell maturation, and the secondary lymphoid organs, in which further differentiation of lymphocytes occurs. Primary lymphoid organs include the thymus, bone marrow, fetal liver, and, in birds, a structure called the bursa of Fabricius. In humans the thymusand bone marrow are the key players in immune function. All lymphocytes derive from stem cells in the bone marrow. Stem cells destined to become B lymphocytes remain in the bone marrow as they mature, while prospective T cells migrate to the thymus to undergo further growth. thats why lymph nodes function as a lymphatic organ