diagram of veins and arteries in the body

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Dr. Gregory Spitz answered:

How many arteries and veins to the human body؟?

Variable

Blood_vessels
variable and too many to count
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Dr. Ted King answered:

What is unique about the pulmonary veins and pulmonary arteries when compared to other veins and arteries on the body?

They are backwards

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All arteries in the body carry oxygenated blood from the heart. After leaving the arteries, blood enters capillaries where oxygen is dropped off and carbon dioxide waste is picked up. Veins then take the carbon dioxide back to the heart. Now here is the difference. The pulm. arteries then take the blood with carbon dioxide to the lungs where oxygen is picked up and carried by the pulm. veins.
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Dr. David Earle answered:

Might it be that a a hernia push on blood vessels or arteries and cause loss of blood flow to lower part of body?

Doubtful

Artery
A hernia is a hole in the abdominal wall, and the blood vessels to the abdominal contents come from the back of the abdominal cavity near the spine, so while I suppose anything can happen, I can't imagine a scenario where the hernia is blocking blood supply. Whatever is going through the hole can have its blood supply pinched off, and in its most severe form is called a strangulated hernia.
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What do the coronary arteries and veins do?

Carry blood to heart

Heart
The arteries carry blood and oxygen to the heart muscle itself and the veins bring the blood back to the heart where it passes through the lungs and gets more oxygen.
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Dr. Gabriel Goren answered:

Where are coronary arteries and veins found?

Heart!

Heart
Only in the heart!
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Dr. James H. Isobe answered:

Why do people get blocked veins and arteries?

Family DNA

Thrombosis
Arteries become blocked with arteriosclerosis, and it tends to run in the family, and diet/lifestyle contributes to the progression. Veins become blocked with blood clots, and heredity can make one more prone to development of blood clots. Venous clots occur in the deep and superficial veins, and the former type requires anticoagulation. Prolonged travel, surgery are risk factors for clots.
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What are the major coronary arteries and veins?

LAD, Circ & RCA

Blood_vessels
Coronary arteries: left anterior descending (LAD), circumflex, right coronary artery (RCA). There are no major coronary veins.
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Where can the coronary arteries and veins found?

Heart Surface

Heart
The medical term for the surface of the heart is epicardial.
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How are arteries, veins and capillaries different?

Anatomy

Veins
Arteries what carries blood from the heart to organs and tissues. Vein take blood from organs back to the heart . Both are connected with capillary network
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What are the differences between arteries and veins?

High vs low pressure

Blood_vessels
Arteries take blood from the heart to the tissues of the body under high pressure. Veins take blood from the tissues back to the heart under much lower pressure. Arteries are thicker and have muscle in the walls, veins are thinner.
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