Artery: These are afferent vessel
that carries blood away from the heart. They vary in sizes and their walls are
made up of 3 layers: Tunica Adventitia, Tunica Media, and Tunica Intima. The
size of arteries depends on the muscular and elastic tissues present in it. In
large arteries, the tunica media is more of elastic tissues and less smooth
muscles but this portion changes as the artery branches many times and form
arterioles (small units of arteries). Arteries are usually thicker than vein
and therefore they are able to withstand high pressure.
that carries blood away from the heart. They vary in sizes and their walls are
made up of 3 layers: Tunica Adventitia, Tunica Media, and Tunica Intima. The
size of arteries depends on the muscular and elastic tissues present in it. In
large arteries, the tunica media is more of elastic tissues and less smooth
muscles but this portion changes as the artery branches many times and form
arterioles (small units of arteries). Arteries are usually thicker than vein
and therefore they are able to withstand high pressure.
Vein: They are efferent blood
vessels that carry blood towards the heart at low pressure. The walls of vein
are usually thinner than those of arteries because there is less muscle and
elastic tissue in their tunica media
vessels that carry blood towards the heart at low pressure. The walls of vein
are usually thinner than those of arteries because there is less muscle and
elastic tissue in their tunica media
Vein possess valves which
help to prevent the back flow of blood making sure that it flows towards the
heart. The valves are present in the (upper and lower extremities) limbs where
blood travels a distance and against gravity when standing. The valves are
formed by the fold of tunica intima strengthened by connective tissues.
help to prevent the back flow of blood making sure that it flows towards the
heart. The valves are present in the (upper and lower extremities) limbs where
blood travels a distance and against gravity when standing. The valves are
formed by the fold of tunica intima strengthened by connective tissues.
When vein divides into
smaller vessels, it is referred to as venules.Venules in turn terminate as
small vessels that are capillaries that are made up of single layer of
epithelium.
smaller vessels, it is referred to as venules.Venules in turn terminate as
small vessels that are capillaries that are made up of single layer of
epithelium.
Capillary: They allow the exchange of
substance between the blood and tissues. These includes: gases and nutrients.
Structurally; blood vessels are essentially the same either artery or vein
substance between the blood and tissues. These includes: gases and nutrients.
Structurally; blood vessels are essentially the same either artery or vein
