Capillaries are tiny blood vessels. They need to have a greater surface area to volume ratio because they need to diffuse oxygen quicker.
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.
Depends, how deep. On the skin surface you are looking at capillaries and small veins. Past the skin, you are looking at bigger veins and arteries.
coronary arteries.
Arteries are composed mainly of smooth muscle cells, also known as vascular smooth muscle. These muscle cells are responsible for regulating the diameter and constriction of the arteries, allowing for the control of blood flow and pressure. Additionally, arteries also have a layer of connective tissue and endothelial cells that line the inner surface.
You have blood vessels to carry blood to tissues. You have muscular arteries and thin veins along with the very thin capillaries. Capillaries are very thin individually, but together they dominate the cut surface area.
Coronary arteries
popliteal arteries (a portion of the femoral arteries near the surface of the legs)
The force is greater on a rough surface compared to a smooth surface, due to the increased friction between the surfaces. The rough surface provides more resistance to motion, requiring more force to overcome the friction.
The circulatory system is made up of arteries, veins, and capillaries. Arteries are the deepest, except at the neck and groin. Veins are less deep and in some places can rise along the skin's surface, such as in the crook of the elbow and the backs of hands. Capillaries extend to the skin but are small so are mostly not noticeable. The same person can have arm veins that are deeper or more superficial when looking at both arms.
the respiratory surface for protists is the alveolis and capillaries
Veins carry blood towards the heart, typically carrying deoxygenated blood except for the pulmonary veins. Veins have thinner walls and larger lumens compared to arteries, and contain valves to prevent backflow of blood. Veins are located closer to the surface of the body compared to arteries.
The water surface able to be evaporated is greater.