Key Terms interstitial fluid: Examples of these nodules include the gut-associated lymphatic tissue GALT cells as well as the tonsils. This fluid is essentially plasma that leaks out of cardiovascular capillaries into the tissues due to the forces of hydrostatic or oncotic pressure. The fluid enters the lymphatic capillaries by leaking through the minivalves located in the junctions of the endothelium.
These vessels form a unidirectional system which always directs lymph toward the heart.
Learning Objectives Describe the location of B cells and T cells in lymph nodes and the path of lymph circulation. A colorless, watery bodily fluid carried by the lymphatic system, consisting mainly of white blood cells. Current Competitions. The lymphocytes are transported through lymph fluid and leave the node through the efferent vessels to travel to other parts of the body to perform adaptive immune response functions.
When the pressure of lymph fluid increase to a certain point due to filling with more lymph fluid or from smooth muscle contraction, the fluid will be pushed through the valve opening it into the next chamber of the vessel called a lymphangion. Lymphatic Vessels Lymphatic Vessel Structure The lymphatic structure is based on that of blood vessels.AP2 EXAM 2: LYMPHATIC CAPILLARIES
The functions of the lymphatic system play a vital role in ensuring the health of the immune system and blood vessels. Afferent lymph Afferent lymph is that which has been absorbed by the lymphatic capillaries the smallest of the lymphatic vessels and the entry point to the lymphatic system but has not yet passed through a lymph node for filtration.
Interstitial fluid fluid entering the lymphatic system and afferent lymph lymph which has not yet passed through a lymph node contain 20—30 grams of protein per litre, whereas efferent lymph lymph which has passed through a lymph node contains 60 grams of protein per litre. However, it contains very low levels of macrophages.
Lymph is the substance in which escaped blood cells and proteins are collected and returned to the blood circulation. The right lymphatic duct transports lymph collected from the right arm, the right side of the head and the thorax, to the blood circulation, via the right subclavian vein.
Lymph movement occurs despite low pressure due to smooth muscle action, valves, and compression during contraction of adjacent skeletal muscle and arterial pulsation.
The lymphatic system comprises a network of conduits called lymphatic vessels that carry lymph unidirectionally towards the heart. Macrophage clearance of lymph As afferent lymph passes through a lymph node, the macrophages in it are removed. Larger lymph vessels have many more layers of adventitia than do smaller lymph vessels.
Lymphoid tissue, also referred to as lymphoid nodules, is tissue that is dominated by the lymphocytes. When the pressure for interstitial fluid in the interstitial space becomes large enough it leaks into lymph capillaries, which are the site for lymph fluid collection. Edinburgh, Churchill Livingston, 2002.