What is the lymphatic system?
• Lymph is a clear watery fluid that resembles blood plasma but: has fewer proteins its composition varies depending on organs that it drains • the lymphatic system handles 125 ml/hr (2500-2800 ml of lymph/day) ~1/2 of this from the liver and small intestine alone Lymphatic Vessels (lymphatics):
What is lymphoid tissue?
Body Defense/Immunity- lymphoid tissue is an important component of the Immune System (forms a diffuse surveillance defense system in all body tissues and organs • the major role of WBC’s is in body defense • lymphatic system screens body fluids and removes pathogens and damaged cells 2 Lymph
What is a lymphatic vessel?
• Lymph vessels are thin walled, valved structures that carry lymph • Lymph is not under pressure and is propelled in a passive fashion • Fluid that leaks from the vascular system is returned to general circulation via lymphatic vessels.
What is lymph circulation?
Lymph Circulation • Lymph vessels are thin walled, valved structures that carry lymph • Lymph is not under pressure and is propelled in a passive fashion • Fluid that leaks from the vascular system is returned to general circulation via lymphatic vessels.
The lymphatic system consists of numerous lymph nodes deep inside the body. These lymph nodes are connected to lymphatic vessels which circulate the lymph throughout the body. The lymph gets filtered at the lymph nodes. The spleen, tonsils, adenoids and thymus all form a part of the lymphatic system.
Where are lymph nodes found?
Lymph nodes are found throughout the body in a connected network to ensure that all organs and tissues have a connection to the lymphatic system. There are six primary regions of lymph nodes – head and neck, axillary, upper limb, iliac, inguinal, and lower limb. Superficial and deep nodes run along the base of the head and throughout the neck.
What is the largest lymphatic organ in the body?
The spleen is considered the largest lymphatic organ in the system, which is located under the ribcage, above the stomach, and exactly in the left upper quadrant of the abdomen. Other parts of the lymphatic system – tonsils, adenoids and thymus are located on either side of the throat and neck.
Where are lymphocytes activated in the lymphatic system?
It is located in the femoral ring. As a secondary lymphatic organ, lymph nodes are the site of activation of lymphocytes. When the immune system is activated, the primary lymphoid follicles begin to actively proliferate and develop germinal centres.