Final answer:
The lymphatic capillary is the structure that absorbs excess tissue fluid, becoming lymph, which is then transported through the lymphatic system.
Step-by-step explanation:
These small, blind-ended tubes are located throughout the body to collect excess fluid, which becomes lymph. The lymphatic system plays a crucial role in maintaining fluid levels in the body's tissues by absorbing and filtering excess fluid and returning it to the bloodstream. The lymphatic capillaries join to form larger lymphatic vessels, which transport the lymph to the lymph nodes for filtration before eventually being returned to the circulatory system via the lymphatic ducts.