Question

What is Aorta?
Differentciate between artries and veins.

Answer 1

The aorta is the largest artery in the body& The aorta begins at the top of the left ventricle, theheart's muscular pumping chamber. 

 Veins:

carry blood from the tissues of the body back to the heart

are usually positioned closer beneath the surface of the skin

are less muscular than arteries, but contain valves to help keep blood flowing in the right direction, usually toward the heart

would collapse if blood flow stops.

Arteries:

carry blood away from the heart to the tissues of the body

are usually positioned deeper within the body

are more muscular than veins, which helps in transporting blood that is full of oxygen efficiently to the tissues

would generally remain open if blood flow stopped, due to their thick muscular layer.

Answer 2

Aorta - the main or largest artery of the body which arises for left ventricle of the heart and extending down to the abdomen .
difference between arteries and veins are :
1)arteries carry oxygenated blood whereas veins carry dioxyginated blood .
2) arteries have thicker elastic muscular walls whereas veins are much thinner.
3)valves are absent in arteries whereas valves are present in veins.
4)blood flow in high pressure in arteries whereas blood flows in low pressure in veins.
hope this helps you ^_^