Lab 3- Thoracic Vasculature, Heart Circulation

right coronary artery and left coronary artery

two arteries that come off the aorta

left coronary artery

splits into 2

1. left anterior descending artery

2. circumflex artery

left anterior descending artery

comes anteriorly, aka the widow maker

circumflex artery

posterior, wraps around the heart

coronary sinus

probe can be stuck underneath here, blood pools back here and leads to the right atrium

fetal circulation

dimple in heart, that WAS foramen ovale and is now fossa ovalis

parts of the aorta

1. ascending aorta

2. aortic arch

3. descending aorta

ascending aorta

first part of the aorta that is reached, blood shoots up from the heart

aortic arch

branches into 3 sections

1. Brachiocephalic Trunk

2. Left Common Carotid Artery

3. Left Subclavian Artery

descending aorta

where blood shoots down

brachiocephalic trunk

splits into two

1. right common carotid artery(going up)

2. right subclavian artery(going to the right)

right common carotid artery

splits into 2

1. right external carotid artery

2. right internal carotid artery

right subclavian inferior branch

internal thoracic artery, inside the thoracic cavity

internal thoracic artery

the only inferior branch of the right subclavian artery, can be observed in breastplate

internal thoracic artery branches

called anterior intercostal arteries, goes into intercostal spaces to feed muscles

right subclavian superior branches

1. vertebral arteries

2. thyrocervical trunk

all branches of the right subclavian artery

1. internal thoracic artery

2. vertebral artery

3. thyrocervical trunk

vertebral artery

split from the right subclavian artery going superiorly, deepest one

thyrocervical trunk

split from the right subclavian artery going superiorly, the base of another split of 3

splits of thyrocervical trunk(going from lateral to medial)

1. suprascapular artery

2. transverse cervical artery

3. inferior thyroid artery

right and left brachiocephalic veins

two branches that all veins merge from

superior vena cava

one branch that all veins merge from

right brachiocephalic vein splits

1. right vertebral vein(dw about on exam)

2. right internal jugular vein

3. right external jugular vein

4. right internal thoracic vein

5. right subclavian vein

superior splits of right brachiocephalic vein

1. right internal jugular(more medial)

2. right external jugular vein(more lateral)

right internal jugular vein

coming off of the right brachiocephalic vein, most medial of the 3 superior veins

right external jugular vein

coming off of the right brachiocephalic vein, most lateral of the 3 superior veins

right subclavian vein

coming from the right brachiocephalic vein, just below the clavicle and going to the right side of the body

internal thoracic vein

coming from brachiocephalic vein, only inferior vein, appears as a dark looking vessel

branches coming off internal thoracic veins

called anterior intercostal veins

azygos vein

right side, major posterior vein

branches off azygos vein

posterior intercostal veins

two major posterior veins of the left side

1. hemizygous

2. accessory hemizygous

hemizygous

one of the main posterior veins of the left side, coming from the inferior side

accessory hemizygous

one of the main posterior veins of the left side, coming from the superior side

branches off the left side of the body

posterior intercostal veins