Anatomy of blood vessels

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tunica interna

Endothelial layer that lines the lumen of all vessels; reduces friction; innermost layer.

tunica interna

tunica media

middle layer of artery; made up of smooth muscle fibers and thick layer of elastic connective tissue

tunica media

tunica externa

aka adventitia. the outermost coating of the blood vessel composed of areolar and fibrous connective tissue. It is supportive and protective

tunica externa

internal elastic lamina

in between tunica media and tunica intima; has pores for nutrient diffusion

internal elastic lamina

External Elastic Lamina

separates the tunica media and the tunica adventitis (externa)

External Elastic Lamina

elastic arteries

largest type of artery; contains many elastic fibers that allow it to stretch in response to each pulse; close to the heart

muscular arteries

"Distributing" distal to elastic arteries, deliver blood to organs, thick tunica media

What's the difference between arteries and veins?

The difference is that arteries carry blood away from the heart and veins carry blood towards the heart.

Whats the structual difference between arteries and veins?

arteries are more muscular than veins, veins are often closer to the skin and contain valves to help keep blood flowing toward the heart, while arteries carry blood away from the heart.

capillaries

connect veins and arteries

capillaries

Aorta

the large trunk artery that carries blood from the left ventricle of the heart to branch arteries

ascending aorta

Branches off the left ventricle; carries oxygen rich blood to parts of the body above the heart

aortic arch

the part of the aorta that arches and turns downward

descending aorta

the largest artery of the body; carries blood away from the heart down the midline of the body

coronary arteries

blood vessels that branch from the aorta and carry oxygen-rich blood to the heart muscle

brachiocephalic artery

The first major branch off of the aorta and the major artery to the forelimbs and head.

common carotid arteries

o Right common carotid artery originates from the brachiocephalic trunk o Left common carotid artery originates from the arch of the aorta. Blood to head, face and neck.

subclavian arteries

left and right arteries found in the thoracic cavity, first branch to come off the aorta, supplies blood to the arms

internal carotid arteries

branch of common carotid artery and enters through the carotid canal; reached bases of brain through either side of sella turcica

external carotid arteries

supplies structures to EXTERNAL skull

superficial temporal arteries

artery that supplies blood to the muscles of the front, side, and top of the head

facial arteries

Carries blood from the external coprotid to Cheeks, nose, mouth, eyes

maxillary arteries

Carries blood from the Eternal corotid to the Deep Facial structures

occipital arteries

supply posterior dura with blood

vertebral arteries

one of two main arteries to the brain (the other is ICA) is paired rising from the foramen magum and forms the basilar artery

axillary arteries

conveys oxygen rich blood from aorta to arm, pectorals.

subscapular arteries

Conveys oxygen rich blood from aorta to shoulder and arm

brachial arteries

Branch of the axillary arteries that goes down the arm towards the elbow

radial arteries

the brachial artery divides and becomes these as it reaches the elbow and travels along the forearm to the hand.

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