Learning Aim B – Understand the impact of disorder on the
physiology of the lymphatic system and the associated corrective
treatment.
P3 – Describe the gross anatomy and function of the organs of the lymphatic system.
P4 – Describe the effect of a disorder on the lymphatic system and possible corrective
treatments.
M2 – Explain the physiological reasoning for corrective treatment(s) associated with some
disorders of the lymphatic system.
D2 – Evaluate the effect of corrective treatment(s) for a disorder of the lymphatic system.
Diagram of the Lymphatic System:
, The lymphatic system, which is a part of an individual’s immune system, is a network of vessels,
organs and tissues, that are spread throughout the body. The lymphatic system plays a crucial
role in maintaining fluids balance, as well as fighting infections. For example, the lymphatic
system drains lymph fluid that has been leaked from the blood vessels into the tissues and
releases it back into the blood stream through lymph nodes. Overall, the lymphatic system is
important for the optimal functioning of our general and specific immune responses.
Primary Lymphoid Organs:
Within primary lymphoid organs, immune cells known as lymphocytes are produced and
matured. The primary lymphoid organs are essential for the development and maturation of
lymphocytes. These organs include the bone marrow and thymus. The bone marrow is a
sponge-like tissue which is found inside bones. The bone marrow forms a specialised stem cell.
These are undeveloped cells that can divide and grow into all the different types of blood cells
that our body requires to function adequately For example, during birth many bones contains
‘red bone marrow’ which create immune system cells. Overtime, red bone marrow turns into
fatty tissue. In addition to this, the thymus is a gland which is located in the chest between the
lungs. It is mostly active during childhood and adolescence and gradually decreases in size with
age. The thymus is responsible for producing white blood cells, which are known as ‘T-
lymphocytes.’ These are a part of the immune system, which play an important role in fighting
infections. For example, T lymphocytes learn to tell the difference between things that belong in
an individual’s body and things that don’t, which means they only respond to the things that
shouldn’t be there such as bacteria and viruses.
Secondary Lymphoid Organs:
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