Canine Gross Anatomy - Vessels Of The Thoracic Cavity

Front 1

What vessels branch off of the ascending aorta?

Back 1

Coronary aa.

Front 2

What vessels branch off of the aortic arch?

Back 2

L. subclavian, brachiocephalic trunk

Front 3

What vessels branch off of the Brachiocephalic trunk?

Back 3

R and L common carotid, R subclavian a.

Front 4

What vessels branch off of the descending aorta?

Back 4

Dorsal intercostal aa., bronchoesophageal a.

Front 5

What are 4, 4', 5, 6, 7, 8, 9, 10 and 11 in this picture?

Back 5

4. Left subclavian a.
4'. Right subclavian a.
5. Brachiocephalic trunk
6. Vertebral a.
7. Costocervical trunk
8. Left and right common carotid aa.
9. Superficial cervical a.
10. Axillary a.
11. Internal thoracic a.

Front 6

Where does the vertebral artery course?

Back 6

Through the transverse foramina of C6-C1 vertebrae

Front 7

What does the vertebral a. supply with blood?

Back 7

The cervical muscles

Front 8

Does the vertebral a. course through the transverse foramen or the lateral vertebral foramen?

Back 8

Both you silly peanut! It courses through the transverse foramen until the atlas, when it veers dorsally and goes through the lateral vertebral foramen to become the basilar a.

Front 9

The vertebral a. branches to form what two vessels?

Back 9

Ventral spinal a. and basilar a.

Front 10

Which vessel is the largest source of blood to the brain?

Back 10

The basilar a. It is a branch of the vertebral a. The ventral spinal a. (also from branches of the verberal a.) fuses with it to supply the brain with blood.

Front 11

What branches from the costocervical trunk?

Back 11

Dorsal scapular a.
Deep cervical a.
Thoracic vertebral a.

Front 12

What does the thoracic vertebral a. gives rise to what?

Back 12

The first three dorsal intercostal aa.

Front 13

What artery courses deep to transversus thoracis m.?

Back 13

Internal thoacic a.

Front 14

What branches off of the internal thoracic a.?

Back 14

Ventral intercostal aa.

Front 15

What is the terminal branch of the internal thoracic artery?

Back 15

Cranial deep epigastric a.

Front 16

Where does the cranial epigastric a. emerge from the thorax?

Back 16

Caudal to the costal arch.

Front 17

What artery perforates rectus abdominis m. and runs caudally on the superficial surface of rectus abdominis m.?

Back 17

Cranial superficial epigastric a.

Front 18

What name does the descending aorta go by in the thoracic portion and abdominal portion?

Back 18

Thoracic aorta and abdominal aorta. The aorta is not a very clever or creative vessel.

Front 19

Are the lungs and esophagus fed by the same aa.?

Back 19

Yes - both the bronchial and esophageal brs. derive from the bronchoesophageal aa.

Front 20

Where do the intercostal aa. arise from?

Back 20

1-3 arise from costocervical trunk
4-12 arise directly from aorta

Front 21

Are the dorsal or ventral intercostal aa. thicker?

Back 21

The dorsal, because they are coming from the high pressure lifestyle of the aorta.

Front 22

Where do the intercostal vessels and nerves course?

Back 22

Along the caudal border of each rib.

Additional branches from the internal thoracic vessels course cranial to the ribs more ventrally.

Front 23

Why are we likely to be asked about the path that the intercostal vessels and nerves take?

Back 23

She’s likely to ask us where these vessels and nerves course (along caudal border of each rib), because clinically, we’ll need to know to not incise there. Ventrally, it gets trickier, as branches cross to the cranial border, and great care should be taken.

Front 24

Describe how the cranial vena cava branches to the subclavian level.

Back 24

The cranial vena cava branches to form the right and left brachiocephalic vv. These branch to form the R and L subclavian and external jugular vv.

Front 25

T/F
Only the left azygous develops?

Back 25

False. Only the right azygous develops.

Front 26

T/F
The azygous drains blood from both R and L body walls?

Back 26

True. The azygous collects blood from the dorsal intercostal veins which drain blood from the dorsal third of the thoracic wall.

Front 27

Where do the dorsal intercostal vv. drain into?

Back 27

The azygous vein.

Front 28

What do the R and L internal thoracic veins usually drain into?

Back 28

A common trunk, which drains into the cranial vena cava.

Front 29

In the dog, what might the left internal thoracic vein independently drain into? And independent of what?

Back 29

It might drain independtly into the left brachiocephalic vein. "Normally" both R and L internal thoracic veins would drain into a common trunk and then into the cranial vena cava.

Front 30

Where do the dorsal and ventral intercostal veins drain into?

Back 30

Dorsal - into the azygous v.
Ventral - into the internal thoracic v.

Front 31

Which will be larger, dorsal or ventral intercostal veins and why?

Back 31

Ventral intercostal veins will be larger because 2/3 of the blood will drain into them.

Front 32

Where would you be able to locate the thoracic duct?

Back 32

The left side.

Front 33

Where does the thoracic duct carry lymph from?

Back 33

The cisterna chyli at the level of the diaphragm to the venous system cranial to the heart

Front 34

Where does the thoracic duct drain its lymph into?

Back 34

usually drains into the external jugular vein, cranial vena cava or left brachiocephalic vein

Front 35

What does the thoracic duct course with?

Back 35

The aorta and azygous v.

Front 36

How does the placement of the aorta differ in dogs and cats?

Back 36

In the dog, at the level of heart, the thoracic duct passes obliquely from the right to the left, crossing the esophagus

In the cat, the thoracic duct is located to the left of the aorta in the caudal part of the mediastinum

Front 37

Where does the thoracic duct course to?

Back 37

It follows the esophagus to the thoracic inlet.

Front 38

What is the goal of the lymphatic system?

Back 38

To get the lymph back into the veinous system.

Front 39

Where do the lymphatics usually dump the lymph into the veinous system?

Back 39

Usually cranial to the heart.

Front 40

What is #7?

Back 40

Cisterna chyli

Front 41

What is #5?

Back 41

Thoracic duct

Front 42

Where does abdominal lymph drain?

Back 42

Drains into the cisterna chyli.

Front 43

Where does lymph from the cisterna chyli go?

Back 43

Up the thoracic duct to drain into the external jugular (usually). Or drain into the cranial vena cava. Or into the left brachiocephalic v. That's it.