Final answer:
Lymphatic capillaries are extremely permeable vessels that absorb larger molecules and fluid, transporting them through the lymphatic system to the cardiovascular system.
Step-by-step explanation:
Lymphatic capillaries are extremely permeable vessels that form part of the lymphatic system. Their high permeability allows for the absorption of larger molecules and excess interstitial fluid, which is then transported through the lymphatic network. Unlike blood capillaries that are part of a closed circulatory system and have a two-way exchange, lymphatic capillaries are part of an open system that collects lymph and delivers it to the cardiovascular system. Lymphatic capillaries function to transport nutrients such as absorbed fats from the intestine and maintain fluid balance by draining into larger lymphatic vessels that eventually reach the subclavian veins in the upper chest.