ANATOMY - Aorta, Vena Cava and Azygos Vein Flashcards
What are the four main components of the aorta?
Ascending aorta
Aortic arch
Descending aorta
Abdominal aorta
Describe the initial branching of the aortic arch in carnivores and pigs
The brachiocephalic trunk branches from the aortic arch and branches into the left common carotid artery, right common carotid artery and right subclavian artery. The left subclavian artery branches from the aortic arch independently, distal to the brachiocephalic trunk
Describe the initial branching of the aortic arch in horses and ruminants
The brachiocephalic trunk branches from the aortic arch and branches into the left common carotid artery, right common carotid artery, right subclavian artery and left subclavian artery
Where in the body do the common carotid arteries branch into the internal and external carotid arteries?
The common carotid arteries branch into the internal and external carotid arteries just above the larynx
What do the internal and external carotid arteries supply?
Head
Brain
What are the four major arteries branching from the subclavian artery?
Vertebral artery
Costocervical artery
Superficial cervical artery
Internal thoracic artery
Which arteries branch from the vertebral artery as it runs cranio-dorsal?
Basilar artery
Ventral spinal artery
What is supplied by the basilar artery?
Brain
What is supplied by the ventral spinal artery?
Spinal cord
Which arteries branch from the costocervical artery?
Deep cervical artery
First three intercostal arteries
What is supplied by the deep cervical artery?
Dorsal neck muscles
Where do the remaining intercostal arteries branch from?
The remaining intercostal arteries branch directly from the descending aorta
What is supplied by the superficial cervical artery?
Ventral neck muscles
Cranial shoulder
Upper forelimb
Which arteries branch from the internal thoracic artery?
Ventral intercostal arteries
Cranial superficial epigastric arteries
Cranial deep epigastric arteries
(also known as musculophrenic)
Describe the pathway of the internal thoracic artery
The internal thoracic artery travels ventrally along the sternum branching into the ventral intercostal arteries until it travels under the diaphragm and branches into the cranial superficial epigastric arteries and cranial deep epigastric arteries
Which artery supplies arterial blood to the forelimb?
Subclavian artery
Describe the organisation of the forelimb arterial supply
The subclavian artery supplies the forelimb however the name of the artery changes depending on the region of the forelimb it is located. The subclavian artery becomes the axillary artery, then the brachial artery, and finally the median artery
Where in the body does does the bronchoesophageal artery branch from the descending aorta?
The bronchoesophageal artery branches from the descending aorta at the level of the fifth intercostal space
What is supplied by the bronchoesophageal artery?
Oesophagus
Lung tissue
Where does the descending aorta penetrate the diaphragm to enter the abdomen?
Aortic hiatus