Blood supply to the heart Flashcards

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1
Q

why does the heart need its own blood vessels?

A

the heart is to thick to recieve blood directly from its chambers therfore the heart has its own blood vessels.

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2
Q

what are the blood vessels that supply blood to the heart?

A

the right and left coronary arteries branch off the ascending aorta to supply the heart with blood.

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3
Q

What does the right coronary artery do ?

A

it supplies the right atrium, both ventricles and AV and SA nodes. (intrinsic cardiac conduction system)

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4
Q

What does the left coronary artery do ?

A

The left coronary artery supplies the left ventricle, left atrium and the interventricular septum.

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5
Q

where is the right coronary artery branches found?

A

Posterior interventricular branch and one or more marginal arteries and usually near a sulcus.

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6
Q

Where is the left coronary artery branches found?

A

Anterior interventricular branchand the circumflex artery and usually near a sulcus.

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7
Q

What is the job of the Coronary veins?

A

they connect to coronary arteries via capillary networks to drain the deoxygenated blood.

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8
Q

what does the Great cardiac vein do?

A

it drains the blood supply by the anterior interventricular artery.

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9
Q

What does the Small cardiac vein do?

A

it drains blood from the posterior right atrium and right ventricle.

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10
Q

what does the middle cardiac vein do?

A

It drains the blood supplied by the posterior inventricular arteries.

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11
Q

What do veins do in general?

A

in general blood flow is toward the heart and is usually low in oxygen, there are exceptions to this rule.

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12
Q

All coronary veins drain?

A

they drain into the coronary sinus which is located in the coronary sulcus.

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