The blood circulatory system consists of small tubular structures responsible for carrying blood known as blood vessels.some intercellular fluid (tissue fluid), however does not re enter capillaries or veins directly, is picked up by thin-walled blind ended lymph vessels.
Outline the functions and position of the structure component is, i.e vessels, tissues, and organs involved in draining of lymph into the blood
The structure and components involved in the draining of lymph into the blood are as follows:
1. Lymph vessels: These vessels form a network throughout the body and are responsible for collecting lymphatic fluid, also known as lymph. Lymph vessels are similar to blood vessels but have thinner walls and valves that prevent backflow of fluid. They include lymph capillaries, collecting vessels, and lymphatic trunks.
2. Lymph capillaries: These small, thin-walled vessels are present in most tissues and organs. They collect excess tissue fluid, along with dissolved substances, proteins, and immune cells, and convert it into lymph.
3. Lymph nodes: These small, bean-shaped structures are located along the lymphatic vessels and play a vital role in the immune system. Lymph nodes filter and purify lymph, removing waste products, pathogens, and foreign particles. They are responsible for the production and activation of immune cells, such as lymphocytes.
4. Lymphatic trunks: These are larger vessels formed by the merging of collecting lymphatic vessels. There are several major lymphatic trunks in the body, including the lumbar trunks, intestinal trunks, bronchomediastinal trunks, subclavian trunks, and jugular trunks.
5. Thoracic duct: The thoracic duct is the largest lymphatic vessel in the body and drains lymph from the lower body, left upper body, and the right side of the body above the diaphragm. It begins as a dilation called the cisterna chyli in the abdomen and ascends through the thorax, ultimately emptying into the left subclavian vein.
6. Right lymphatic duct: This smaller lymphatic vessel drains lymph from the right side of the body above the diaphragm. It empties into the right subclavian vein.
7. Blood vessels: Finally, the lymph is returned to the blood circulation through the drainage points called lymphatic ducts, where lymphatic vessels join with the blood vessels. The lymphatic ducts, including the thoracic duct and right lymphatic duct, deliver lymph into the bloodstream by emptying into the subclavian veins.
The overall function of this lymphatic system is to drain excess tissue fluid and return it to the bloodstream, while also filtering and purifying the lymph from any harmful substances. Additionally, the lymphatic system helps in immune response by carrying immune cells and antibodies to various parts of the body for protection against infections and diseases.