Read the following statements and select the correct optionStatement 1...
Lymphatic capillaries lie close to the blood capillaries and end blindly. Lymph does not flow in circular manner. Lymph from the lymphatic capillaries goes into the lymphatic vessels and then from the thoracic duct and right lymphatic duct it does into the left and right subclavian vein respectively.
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Read the following statements and select the correct optionStatement 1...
Statement 1: Lymphatic capillaries are free and blind at one end.
Lymphatic capillaries are tiny, thin-walled vessels that are found throughout the body. They are an important part of the lymphatic system, which is responsible for the transport of lymph fluid. Lymphatic capillaries differ from blood capillaries in that they are more permeable and have a slightly larger diameter.
One of the key characteristics of lymphatic capillaries is that they are blind-ended, meaning that they have closed ends. This is in contrast to blood capillaries, which form a continuous network. The blind-ended structure of lymphatic capillaries allows them to collect excess interstitial fluid, proteins, and other substances from the tissues.
The blind end of the lymphatic capillary is formed by overlapping endothelial cells. These cells create small gaps between them, allowing fluid and other substances to enter the capillary. Once inside, the fluid is called lymph and it starts its journey through the lymphatic system.
Statement 2: Lymph does not flow in a circular manner.
Lymph fluid does not flow in a circular manner like blood does in the circulatory system. Instead, lymph flows in one direction only, from the tissues towards the heart.
The movement of lymph is facilitated by several factors. First, the contraction of surrounding skeletal muscles helps to squeeze the lymphatic vessels, pushing the lymph forward. This is why physical activity and exercise are important for the proper functioning of the lymphatic system.
Additionally, the lymphatic vessels have valves that prevent the backflow of lymph. These valves ensure that the lymph flows in the correct direction, towards the heart.
Another important factor in lymph circulation is the rhythmic contraction of smooth muscles in the lymphatic vessels. This contraction, known as lymphangion contraction, propels the lymph forward.
The lymphatic system also relies on the pumping action of adjacent arteries and the pulsations of nearby organs to help move lymph through the vessels.
In summary, both statements 1 and 2 are correct. Lymphatic capillaries are free and blind at one end, allowing them to collect fluid and other substances from the tissues. Lymph fluid does not flow in a circular manner but rather moves in one direction, towards the heart, aided by various mechanisms such as muscle contractions and valves.
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