[libribook.com] Traumatic Scar Tissue Management 1st Edition

16.06.2020 Views

Clinical ConsiderationNerves, blood vascular and lymphatic vessels are wrapped in layers ofconnective tissue (CT) or fascia – considered to be a form of CT. Recentstudies indicate that CT can dynamically regulate its tension (Langevin etal. 2013) suggesting that changes in tissue tension could affect thefunctioning of the surrounding enveloped structures. Releasing unduetension may improve neural function and fluid flow.Lymphatic vessels contain more valves and more frequent anastomoses thanblood circulatory vessels, thereby reducing back flow and creating an extensive,connected network of tubes (Marieb 2003, Macdonald et al. 2008). The smaller,thin-walled lymph capillaries are slightly larger than those seen in the bloodvascular system. Unlike the tightly joined endothelial cells lining blood vascularcapillaries, lymph capillary endothelial cells loosely overlap, augmentingporosity thereby facilitating the collection of larger molecules.Afferent lymphatic vessels: carry unfiltered lymph into the nodes, where wasteproducts and some of the fluid is filtered out.Efferent lymphatic vessels: carry the filtered lymph out of the node to continueits return to the circulatory system.

Lymph NodesThe lymph node (see Fig. 3.2) is part of the many types of lymphoid organs inthe body. There are between 600 and 700 lymph nodes present in the averagehuman body. It is the role of these nodes to filter the lymph before it can bereturned to the circulatory system. Although these nodes can increase ordecrease in size throughout life, any nodes that have been damaged or destroyeddo not regenerate.Lymph nodes contain macrophages that destroy bacteria, viruses and othersubstances before the lymph is returned to the blood vascular system (Marieb2003).

Lymph Nodes

The lymph node (see Fig. 3.2) is part of the many types of lymphoid organs in

the body. There are between 600 and 700 lymph nodes present in the average

human body. It is the role of these nodes to filter the lymph before it can be

returned to the circulatory system. Although these nodes can increase or

decrease in size throughout life, any nodes that have been damaged or destroyed

do not regenerate.

Lymph nodes contain macrophages that destroy bacteria, viruses and other

substances before the lymph is returned to the blood vascular system (Marieb

2003).

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