AP BIOLOGY

Detailed explanation-1: -The lymphatic vessels come together in still-larger tubes called collecting ducts. A series of valves keep the fluid moving one way. The collecting ducts empty the lymph into the right or left lymphatic duct (thoracic duct).

Detailed explanation-2: -Lymphatic Vessels The wall of the lymph capillary is composed of endothelium in which the simple squamous cells overlap to form a simple one-way valve. This arrangement permits fluid to enter the capillary but prevents lymph from leaving the vessel.

Detailed explanation-3: -To ensure that fluid does not flow backward, all lymphatic have one-way valves. The forward flow of lymph is due to the pressure gradient created by the muscle contractions and respiratory movements. The key feature of lymphatic vessels is that they have thin endothelial walls and have an overlapping arrangement.

Detailed explanation-4: -Fluid that is forced out of the bloodstream during normal circulation is filtered through lymph nodes to remove bacteria, abnormal cells and other matter. This fluid is then transported back into the bloodstream via the lymph vessels. Lymph only moves in one direction, toward the heart.

Detailed explanation-5: -The lymphatic system does different things: it acts as a one-way drainage system – this means it moves fluid from body tissues into the blood circulation. it contains white blood cells called lymphocytes, which fight infection. it gets rid of any waste that cells make.