diagram of major arteries and veins

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the histology of the major arteries and veins of systemic circulation?

What about them?

Artery
Please ask a specific question about the histology. That cannot be answered here = it would take many pages and diagrams. Such information is freely available on the internet.
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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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ana report is normal ,colordopler of both limb is normal all major veins & arteries shows normal flow still i have ulcer above ankel is it vasculitis?

Yes

Biopsy
Ulcers on legs/ankles has multiple cause not just venous insufficiency or major arterial blockage. Other causes includes vasculitis, trauma, recurrent or chronic infection , cancer and others . I would suggest checking with a wound specialist who can order blood test and probably perform a biopsy If this ulcer is chronic or has been there for more than 6 weeks
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Dr. John Landi answered:

I have a vein in my left leg that hurts. It is becoming larger and protruding. This vain is on my left leg above my knee on the outside of my leg. Is there a major artery there?

Seems like vein.

What you are describing appears to be a varicose vein. There are no major arteries in that location and under the skin. Varicose veins do occur in this area and are usually due to malfunctioning valves in either the saphenous vein or anterior accessory saphenous vein. A venous reflux ultrasound would make the diagnosis and help to formulate a treatment plan.
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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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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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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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