Medically the evaluation by Gerhard Whitworth, R.N. — composed by Scott Frothingham — to update on April 12, 2018

Arteries room blood vessels responsible for transporting oxygen-rich blood away from the heart to the body. Veins space blood vessels that carry blood short in oxygen indigenous the body earlier to the heart because that reoxygenation.

Arteries and also veins are two that the body main kind of blood vessels. This vessels are networks that distribution blood come the body. They’re component of two closed equipment of tubes that begin and also end at the heart. These solution of tubes space either:

Systemic. The systemic vessels are arteries that carry oxygen-rich blood from the heart’s left ventricle to the organization in all components of the body. They then return oxygen-poor blood v the veins earlier to the heart’s right atrium.

There room three species of arteries. Each type is written of three coats: outer, middle, and inner.

You are watching: Why are artery walls so much thicker than those of corresponding veins

Elastic arteries are likewise called conducting arteries or conduit arteries. They have actually a thick middle layer for this reason they have the right to stretch in response to every pulse that the heart.Muscular (distributing) arteries room medium-sized. They attract blood native elastic arteries and also branch into resistance vessels. These vessels include little arteries and also arterioles. Arterioles are the smallest department of arteries that carry blood away from the heart. They straight blood right into the capillary networks.

There space four types of veins:

Deep veins are located within muscle tissue. They have actually a corresponding artery nearby.Systemic veins are situated throughout the human body from the legs as much as the neck, including the arms and also trunk. They move deoxygenated blood back to the heart.

Use this interaction 3-D diagram to discover an artery.

Use this interactive 3-D diagram to discover a vein.

The wall surfaces of veins and arteries room both consisted of of 3 layers:

Outer. Tunica adventitia (tunica externa) is the external layer the a blood vessel, consisting of arteries and also veins. It’s greatly composed the collagen and elastic fibers. These fibers allow the veins and arteries to stretch a restricted amount. Lock stretch enough to be versatile while maintaining stability under the press of blood flow. Middle. The center layer that the wall surfaces of arteries and veins is called the tunica media. It’s make of smooth muscle and also elastic fibers. This class is more thick in arteries and also thinner in veins.Inner. The inner class of the blood vessel wall surface is referred to as tunica intima. This class is make of elastic fiber and also collagen. That is consistency varies based upon the form of blood vessel.

Unlike arteries, veins save on computer valves. Veins need valves to keep the blood flowing towards the heart. Theses valves are an especially important in the legs and also arms. Castle fight heaviness to avoid the backflow that blood.

Arteries don’t need valves since the push from the heart keeps the blood flowing through them in one direction.

The cardiovascular device is a closed system of vessels called arteries, veins, and capillaries. Lock all linked to a muscular pump called the heart. The cardiovascular mechanism keeps a continuous and regulated movement that blood that delivers nutrients and oxygen come every cabinet in the body. It does this through hundreds of miles of capillaries between the arteries and also the veins.

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Capillaries. Capillaries space the smallest and most countless of the blood vessels. They attach between the arteries (which lug blood far from the heart) and the veins (which return blood to the heart). The primary function of capillaries is the exchanging of materials, prefer oxygen, between the blood and also tissue cells.

Nutrients and oxygen are ceded to every cabinet in your body with a circulatory system. The heart pumps oxygenated blood to your cells v arteries. The pumps oxygen-depleted blood away from her cells through veins.


Medically the review by Gerhard Whitworth, R.N. — written by Scott Frothingham — update on April 12, 2018