Question

select all that apply
choose all vessels that have valves.
veins
blood capillaries
arteries
lymphatic vessels

Explanation:

Veins have valves to prevent the back - flow of blood against gravity. Lymphatic vessels also have valves to ensure one - way flow of lymph. Blood capillaries are tiny vessels without valves. Arteries have no valves as the high - pressure blood flow from the heart propels blood forward.

Answer:

veins, lymphatic vessels