The Lymphatic System Assignment
The lymphatic system contains a fluid, which is known as lymph. The vessels that transport lymph around the body are called lymphatic vessels. The lymph vessels are lined by different endothelial cells. These cells contain a thin layer of smooth muscle which binds the lymph vessels to the surrounding tissue. Some examples of organs which contain lymphoid tissue include lymph nodes, the spleen, and the thymus.The Lymphatic System Assignment
Within the lymphatic system, the lymph contains different nutrients, hormones, and fatty acids. It also contains toxins and cellular waste products. These are transported to and from the cellular tissues. Lymph is a fluid which is received from the blood plasma. It is pushed out of the capillary wall by pressure which has been exerted by the heart. As the interstitial fluid starts to accumulate, it is picked up and removed by the lymphatic vessels which pass through the lymph nodes. As the lymph passes through the different lymph nodes, some lymphocytes and monocytes begin to enter it.The Lymphatic System Assignment
Lymph also has the role in returning different types of proteins and excess interstitial fluid back to the bloodstream. Lymph may pick up some bacteria and bring them to the lymph nodes, where they are then destroyed. Cancer cells such as Metastatic cancer cells can also be transported via the lymph. Lymph can also transport fats from the digestive system to the blood via chylomicrons (a droplet of fat which is present in the lymph after it is absorbed by the small intestine).
Lymphatic vessels have the role of transport lymph from the peripheral tissues to the veins of the cardiovascular system. Lymphatic capillaries are called blind-ended tubes which contain thin endothelial walls (these are only a single cell in thick). They are arranged in an overlapping pattern, so pressure from the surrounding capillary can force the cells to allow fluid to enter the capillary.
The lymphatic vessels can also grow progressively larger and will start to form 2 lymphatic ducts. These are the right lymphatic duct, which will drain the upper right quadrant as well as the thoracic duct, which drains the remaining lymphatic tributaries. These include veins. The lymphatic vessels also have 1-way valve system to prevent any backflow of blood. The pressure gradients that move the lymph through the different vessels come from the skeletal muscle action, smooth muscle contraction which is located within the smooth muscle wall, and respiratory movement.The Lymphatic System Assignment
Lymph nodes have to monitor the composition of lymph. Another main role is identifying the location of pathogen to begin engulfment and eradication. They play a large role in the immune system.
Lymph vessels have the ability to route lymph fluid through the lymph nodes throughout and around the entire body. Lymph nodes are very small structures that can work as filters for many different harmful substances. They contain some immune cells that can help fight some infections by attacking and destroying germs that are carried in through the lymph fluid.The Lymphatic System Assignment
There are hundreds of lymph nodes throughout the entire body. Each lymph node filters the fluid (lymph) and substances picked up by the vessels that lead to it. This fluid may filter through the lymph nodes which are located at the elbow, or even those under the arm. Fluid received from the head, scalp, and face flows down through lymph nodes into the neck. Some lymph nodes are located deep inside the body to filter fluid in those areas. For example, lymph nodes located at the lungs or around the bowel. The lymph fluid then begins to slowly flow in from all around the body, making its way back to the main part which is located at the chest. At the end of its journey, the different types of filtered fluids and salts as well as proteins are places back into the bloodstream. The Lymphatic System Assignment