Chapter 22, Problem 22.1.1AYLO

Summary Introduction

To determine:

The different components that constitute a lymphatic system.

Introduction:

The major function of the lymphatic system is to maintain the balance between body fluids. It also provides immunity by generating different types of immune cells. It is not possible for the circulatory system and immune system to work without the lymphatic system.

Explanation of Solution

The lymphatic system comprises of the following components:

• Lymph:

A fluid similar to blood plasma that is usually clear and colorless and is low in protein content. This fluid is taken up by the lymphatic vessels. The composition of lymph varies from time to time and from place to place. For example: after a meal, the lymph turns to milky in appearance due to the presence of high lipid content. The different substances that are present in the lymph are macrophages, hormones, bacteria, viruses and traveling cancer cells.

• Lymphatic vessels:

These are similar to that of blood vessels. These vessels reach every part of the body except cartilage, bone, bone marrow and cornea. These vessels close at one end

• Lymphatic tissues:

The aggregation of the cells, lymphocytes forms the lymphatic tissue. The simplest type of lymphatic tissue is that in which lymphocytes are not densely clustered rather, they are scattered. These simple types of lymphatic tissues are referred to as diffuse lymphatic tissue.

• Lymphatic organs:

These are also known as lymphoid organs. Redbone marrow, thymus, lymph nodes, tonsils and spleen all come under lymphatic organs. Out of these, red bone marrow and thymus come under primary lymphatic tissue, and rest all are categorized under the secondary lymphatic organs.

Conclusion

The lymphatic organs are vital for our body as it helps in producing different types of response against any bacteria or virus that invades in the human body.