Question

List in tabular form three differences between arteries and veins.

Answer 1

Hint In a closed type circulatory system, blood flows inside the blood vessels whose walls are made up of three layers and these blood vessels are differentiated based on their function, structure, and physiology.

Complete answer:

Arteries	Veins
Oxygenated blood is carried away from the heart by arteries except for the pulmonary artery as it carries deoxygenated blood from the heart to the lungs	Deoxygenated blood is carried towards the heart from the body parts by veins except for the pulmonary vein which carries oxygenated blood from the lungs to the heart
They appear bright red in color	They appear in dark red in color
They are situated very deep inside the body	Veins generally appear superficially on the body
The walls of the arteries are thick as tunica media is relatively thick. They have smooth muscles and two elastic laminae.	The walls of the veins are thin (tunica media is relatively thin with one elastic lamina) and the walls of the veins are slightly muscular.
Narrow lumen is seen	Wide lumen is seen
In arteries valves are absent	Valves are present in the veins
In arteries, blood flows with more pressure and with jerks	In veins, blood flow is steady and with low pressure.
They end in capillaries	They start with capillaries

Additional information:
- In higher organisms such as mammals, blood circulation is of closed type as blood flow inside the blood vessels such as arteries, veins, and capillaries
- Walls of arteries and veins are made up of three layers namely tunica externa, tunica media, and tunica interna.
- The thickness of tunica media shows differences between arteries and veins.

Note:
Arteries and veins are connected by the smallest blood vessels called capillaries.
They contain only a single layer made up of simple squamous epithelium.
Aortic arches contain small blood called vasa vasorum, the smallest blood vessels in the body.