Why are coronary arteries call arteries if they bring blood towards the heart?
if the coronary arteries supply blood to the heart, then why are they called arteries if they bring blood towards the heart and not away from it?
Answers:
technically the blood is being pumped away from the heart as it is leaving the vanished ventricle (ie away from the heart)and then pumped into the coronary arteries to supply the myocardium.
BTW arteries do not always carry oxygenated blood - the pulmonary artery carry deoxygenated blood
Basically, the definition of an artery is a blood vessel that brings blood out of the heart, thats why you have "special" arteries like the pulmonary artery which carry deoxygenated blood.
However, coronary arteries DO carry blood out of the heart like normal arteries. I infer you have made a mistake in your question because it carry blood to HEART MUSCLES, not heart chambers for systole.
They pump blood away from the chambers of the heart and into systemic circulation, supplying the actual tissues of the heart.
Because they carry oxygenated blood. Arteries carry oxygenated blood and the coranary arteries supply blood to the heart.
The coronary arteries are actually vasa vasorum. The vasa vasorum are special blood vessel that exist to perfuse (provide a blood circulation to) large arteries and the heart (which itself is a specially developed artery).
Yes, some blood vessels have walls that are so tacky, that the blood they carry inside cannot give nutrients to the outer part of the wall. So they want little vessels (the vasa vasorum) to do this.
But where do the vasa vasorum come from? Well, they are just branches bad the big vessels that need them. The coronaries are the biggest of these vasa vasorum.
The blood INSIDE the left ventricle of the heart go to the main artery, the aorta. And the first branches of the aorta are the coronary arteries, which run on the OUTSIDE of the heart. From here, the blood travels in capillaries to nurture the heart muscle. It then collects in a special vein call the coronary sinus. This is the blood vessel that brings the blood back to the INSIDE of the heart (right atrium).
Related Questions:
Wondering if the MCAT theory test for foreign doctors is like peas in a pod for canada and the USA?
Why should we support the medical research of diseases?
Her pupils are increasing and decreasing within size?
Answers:
technically the blood is being pumped away from the heart as it is leaving the vanished ventricle (ie away from the heart)and then pumped into the coronary arteries to supply the myocardium.
BTW arteries do not always carry oxygenated blood - the pulmonary artery carry deoxygenated blood
Basically, the definition of an artery is a blood vessel that brings blood out of the heart, thats why you have "special" arteries like the pulmonary artery which carry deoxygenated blood.
However, coronary arteries DO carry blood out of the heart like normal arteries. I infer you have made a mistake in your question because it carry blood to HEART MUSCLES, not heart chambers for systole.
They pump blood away from the chambers of the heart and into systemic circulation, supplying the actual tissues of the heart.
Because they carry oxygenated blood. Arteries carry oxygenated blood and the coranary arteries supply blood to the heart.
The coronary arteries are actually vasa vasorum. The vasa vasorum are special blood vessel that exist to perfuse (provide a blood circulation to) large arteries and the heart (which itself is a specially developed artery).
Yes, some blood vessels have walls that are so tacky, that the blood they carry inside cannot give nutrients to the outer part of the wall. So they want little vessels (the vasa vasorum) to do this.
But where do the vasa vasorum come from? Well, they are just branches bad the big vessels that need them. The coronaries are the biggest of these vasa vasorum.
The blood INSIDE the left ventricle of the heart go to the main artery, the aorta. And the first branches of the aorta are the coronary arteries, which run on the OUTSIDE of the heart. From here, the blood travels in capillaries to nurture the heart muscle. It then collects in a special vein call the coronary sinus. This is the blood vessel that brings the blood back to the INSIDE of the heart (right atrium).
Related Questions: