What is the human lymphatic system?

The human body contains two parallel vital systems: the circulatory and lymphatic systems. The first performs the function of feeding the body, while the second purifies it of harmful substances. Scientists claim that the human lymphatic system (LS) originated in the process of evolution from the circulatory system. It consists of lymphatic capillaries, vessels and organs, such as the thymus, spleen, lymph nodes, and performs the function of ensuring the outflow of fluids from tissues and body cells into the circulatory system. However, unlike the circulatory system, drugs Has no arteries and does not assume the presence of a closed circle, so the answer to the question: a closed or non-closed lymphatic system, is obvious.

Capillaries are connected to each other, thus forming a closed network that covers almost all human organs. They consist of endotolial cells without membranes. Lymphatic capillaries absorb the destroyed cells, including tumor cells.

Capillaries up to two millimeters in diameter merge with each other and form lymphatic vessels, which consist of valves, trunks and ducts. Most often, the vessels are located near the veins; They can, as carry lymph from the skin (epifascial), and carry lymph from the muscles and joints (subfascial vessels). The lymph in the vessels is a transparent liquid, similar in composition to the plasma. Lymphatic vessels form six channels, which in turn form two main trunks: the thoracic trunk and the right lymph.

Also, the human lymphatic system carries out lymphatic flow from the internal organs. On this way there are more than ten lymph nodes, which are called "regional". Lymph nodes serve as a biological filter of the human body: they produce lymphocytes that protect the body from various kinds of infections and microbes, thereby forming immunity. In the human body, there are about one hundred and fifty groups of lymph nodes, the largest of which are located on the neck, in the armpits, on the knee and elbow folds, on the occiput and in the groin.

The largest lymph node is considered to be the spleen. The organ that regulates the work of the entire lymph system is the thymus located in the chest. So, the blood cells that get into this organ are transformed into lymphocytes, capable of eliminating negative formations in the human body. In adulthood, these cells turn into adipose tissue.

It should be noted that the lymphatic system is not closed: lymph moves in one direction - from the tissues of the body to the heart. If there is a violation of the process of its movement, a person may have swelling. The lymph supplies the cells with oxygen and various nutrients.

It is important to know that the normal lymph nodes are not probed. In the presence of an infection or a tumor, they can be increased, so it is recommended in such cases to seek the advice of a specialist.

Talk about how the human lymphatic system functions, after various diagnostic measures, such as palpation, ultrasound, analysis, and tomography. To date, there are a large number of different diseases of the lymphatic system, so early diagnosis can help in time to diagnose and begin appropriate treatment.

Thus, the human lymphatic system, along with the circulatory system, plays an important role in the functioning of the entire human body. Being a protective barrier against many infections and diseases, it promotes the intake of oxygen and nutrients in the human body, as well as the removal of decay products and even cancer cells from it.