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Arteries
Arteries are thick-walled blood vessels that carry oxygenated blood away from heart to various body parts.
2,480 Questions
Is mild unfolding of the aorta dangerous?
From GP notebook this can be an insignificant radiographic finding in older people.
What are the walls of the aorta made of?
The aorta is the largest artery in your body.
It is made up of 4 significant sections:
Lumen - The gap in which the blood travels away form the heart. In an artery this is smaller than a vein.
Tunica intima - This is a thin layer on the innermost section of the artery. It is made up of squamous epithelium cels, allowing the blood to move quickly across them at a high pressure.
Tunica media - This is the layer in the middle of the artery. This is the thickest layer of the three. It is mostly made up of smooth muscle fibres and collagen fibres.
Tunica externa - This is the outermost layer. It is mostly made up of collagen fibres, though it does have a few smooth muscle fibres.
This applies to all arteries, not just the aorta.
What is the function of the ascending aorta?
The ascending aorta delivers oxygenated blood FROM the heart, TO the head and arms.
What is the average hospital stay after coronary artery bypass graft surgery?
Generally, most patients can leave the hospital 4-5 days following coronary artery bypass graft surgery. It is important to have family members or friends available to assist you in your first week at home. Some hospitals arrange a home nursing assessment the day after your discharge. Additional services are available through home care agencies for patients who meet certain criteria for physical therapy, occupational therapy, and the services of a home health aide, or social worker.
What is the sac formed by dilatation of a vessel wall in the cerebral artery called?
This is called aneurysm. It is not strong and can rupture causing a stroke.
Why do the blood in the arteries flow in the one direction?
Understand that your circularory system is like a highway that moves in circles and the blood has to flow in those "circles" to deliver it's cargo. Otherwise, things would be dropped off to the wrong customer.
Hemorrhage: Bleeding or the abnormal flow of blood. The patient may have an internal hemorrhage that is invisible or an external hemorrhage that is visible on the outside of the body. Bleeding into the spleen or liver is internal hemorrhage. Bleeding from a cut on the face is an external hemorrhage. The term "hemorrhagic" comes from the Greek "haima," blood + rhegnumai," to break forth = a free and forceful escape of blood.
What is the site where oxygen enters the pulmonary blood?
Oxygen enters the blood in the alveoli of the lungs
What is the difference in function between the hepatic artery and the hepatic portal vein?
The hepatic portal vein transports blood high on glucose concentration and amino acids from the small intestine to the liver while the Hepatic vein transports deoxygenated blood from the liver to the heart and remaining glucose and amino acids to the rest of the body.
Does your heart weaken with age?
Yes, because as you get older your heart also gets older and can't function as well.
Which chamber does the aorta comes from?
The aorta itself does not lead to a specific chamber of the heart. Upon the final stages of the contraction of the heart, blood that is present within the left ventricle of the heart is pumped out of the left ventricle, and is pushed into the aorta, which is the largest artery in the human body. The aorta itself gives rise to all of the other arteries of the body.
Are veins are wider than arteries?
Veins are darker than arteries because they have thin walls, and the darker blood shows through them more easily. Arteries are lighter in color because they have thicker walls containing connective tissue which is lighter in color in preserved material. The veins probably look wider because they collapse when the heart stops beating. When they collapse, they flatten out, making them wider.
No sponges lack organized multicellular organs, such as nerves and muscles.
What is the thickening of the inner wall of an artery called?
Arteriosclerosis is the medical term meaning progressive thickening of the inner walls of arteries.
