plmonary veins begin as capillaries and end as capillaries
the three blood vessels are the Veins capillaries Arteries the arteries.
Capillaries are the structures that connect arteries to veins.
Arteries, capillaries, & veins.
arteries, veins, capillaries
Capillaries are smaller, thinner and have less surface area than veins. Veins take blood to the heart, and capillaries are the thin tubes that connect the veins and arteries together.
Arteries, veins, capillaries.
Capillaries. They are the microscopic tubes that connect the veins and the arteries.
In closed circulatory systems, the blood flows from the heart, to the arteries to the capillaries, to the veins and back. In the open circulatory system, the blood flows into the tissues from the arteries but not into capillaries. It does return back to the heart again by veins. But it is open in the sense that the blood it is free in the tissues.
Capillaries
Venules, they are smaller and thinner than veins.
Pulmonary veins
veins, arteries and capillaries are all called blood vessels or blood streams.