Anatomy Of The Blood Vessels

Transports unoxygenated blood to the lungs where oxygen is loaded and carbon dioxide is unloaded. The central retinal vein runs through the optic nerve.

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The arteriolar lumen regulates the flow of blood through the capillaries.

Anatomy of the blood vessels. Large vessels that contain valves. The most numerous of the blood vessels. The innermost tunic is the tunica intima.

Aside from capillaries blood vessels are all made of three layers. When the heart contracts it pumps blood out through the arteries. Arteries and veins are composed of three tissue layers.

They also take waste and carbon dioxide away from the tissues. These vessels transport blood cells nutrients and oxygen to the tissues of the body. Blood is carried in a closed system of vessels that begins and ends at the heart The three major types of vessels are arteries capillaries and veins Arteries carry blood away from the heart veins carry blood toward the heart Capillaries contact tissue cells and directly serve cellular needs.

Blood pressure results from the blood flow force generated by the pumping heart and the resistance of the blood vessel walls. Blood vessels consist of arteries arterioles capillaries venules and veins. They extend upward into the cranium and join to form this artery.

Blood vessels are found throughout the body. Because of the thin walls of the capillary the exchange of nutrients and metabolites occurs primarily via diffusion. Eventually the smallest arteries vessels called arterioles further branch into tiny capillaries where nutrients and wastes are exchanged and then combine with other vessels that exit capillaries to form venules small blood vessels that carry blood to a vein a larger blood vessel that returns blood to the heart.

From here it drains into the cavernous sinus or superior ophthalmic vein. Arteries arterioles capillaries venules and veins. Vessel networks deliver blood to all tissues in a directed and regulated manner.

The vertebral arteries pass upward from the subclavian arteries toward the back of the neck. The thick outermost layer of a vessel tunica adventitia or tunica externa is made of connective tissue. The pulmonary arteries are more like veins anatomically.

The adventitia or outer layer which provides structural support and shape to the vessel The tunica media or a middle layer composed of elastic and muscular tissue which regulates the internal diameter of the vessel. Anatomy of the blood vessels. Aside from capillaries blood vessels are all made of three layers.

The endothelium is separated from the tough external layers of the vessel by the basal lamina an extracellular matrix produced by surrounding epithelial cells. Blood Vessels and Circulation. The pulmonary arteries carry oxygen-poor blood to the lungs whereas the pulmonary veins carry oxygen-rich blood from the lungs to the left heart.

The tunica intima contains the endothelium the simple squamous epithelium that lines the lumen of all vessels. There are five main types of blood vessels. The adventitia or outer layer which provides structural support and shape to the vessel The tunica media or a middle layer composed of elastic and muscular tissue which regulates the internal diameter of the vessel.

The blood vessels are the components of the circulatory system that transport blood throughout the human body. The blood moving through the circulatory system puts pressure on the walls of the blood vessels. Blood vessels also play a role in controlling your blood pressure.

It is formed when the supraorbital and angular veins unite just behind the trochlea pulley like structure. Structure of Blood Vessel Walls The walls of all blood vessels except the smallest have three layers or tunics that surround a central blood-containing space the vessel lumen. Carries blood from the right ventricle of the heart to the lungs and back to the left atrium of the heart.

Blood is prevented from clotting in the blood vessels by their smoothness and the finely tuned balance of clotting factors. Blood is circulated through the body by blood vessels via the cardiovascular system which is comprised of the heart and the circulatory systemArteries move blood from the heart first to smaller arterioles then capillaries or sinusoids venules veins and back to the heart. Capillaries are thin-walled vessels composed of a single endothelial layer.

The inner surface of every blood vessel is lined by a thin layer of cells known as the endothelium. Microscopic Anatomy of Blood Vessels Structure of Blood Vessels a Arteries and b veins share the same general features but the walls of arteries are much thicker because of the higher pressure of the blood that flows through them. Blood is conducted through blood vessels arteries and veins.

Arteries carry blood away from the heart to other organs. They have relatively thin walls reflecting the fact that the pulmonary circulation is a low pressure bed. The superior ophthalmic vein is usually the largest and is the principal vein.

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