Blood vessels

Arteries and veins are the two primary types of blood vessels in the circulatory system of the body.

Veins :

Veins are one form of a blood vessel that returns deoxygenated blood from your organs back to your heart. Veins are each of the tubular branching vessels that transport blood from the capillaries toward the heart.

Arteries : 

The arteries are the blood vessels that transport oxygen-rich blood from the heart to the tissues of the human body. Each artery is a muscular tube lined by smooth tissue and consists of three layers: The intima, and the inner layer lined by a smooth tissue called the endothelium. Media is the middle layer that consists of elastic fibers that keep your blood flowing in one direction. Adventitia is the outer layer that consists of nerves and tiny vessels.

Capillaries :

Capillaries are tiny blood vessels that have thin walls. Organs and tissues can absorb oxygen and nutrients from the blood via the walls. The capillaries also play a role to keep waste products from your tissues.

The circulatory system is a network of organs that permit the circulation of blood. The circulatory system’s other name is the Cardiovascular system or the vascular system. The primary function of the circulatory system is to transport blood to each part of the body. It is necessary because it carries nutrients, oxygen, carbon dioxide, hormones, and blood cells that are necessary for the hydration and growth of each organ’s cell population.

The Blood circulatory systems are many of the most important processes of the body because they deliver required amounts of oxygen in every portion of the body. The arteries transport the oxygenated blood from the heart to the body parts. Oxygen is provided to the body through diffusion and the blood becomes deoxygenated. This deoxygenated blood is carried return to the heart for oxygenation. This process known as blood circulation occurs continuously in all vertebrates.
 

Biology is part of many competitive exams SSC CGL, UPSC, SSC CPO, and Railways. We have written depth notes on the circulatory System To help you understand the Human Circulatory System in a much better way. To know more about Circulatory System which is mentioned below.