CV System Anatomy 1 Flashcards
In what chambers are the SA and AV nodes?
Right atria
Where does blood from cardiac veins flow into?
Through the coronary sinus into the right atrium
How much serous fluid lies between the parietal and visceral layer of the pericardium?
Approximately 10-15 ml or cc
What work together to prevent tricuspid and mitral valves from buckling open?
Chordae tendinae and papillary muscle. Papillary muscles pull on the chordae tendinae (which attach to AV valves).
When do coronary arteries fill?
During diastole blood backs up and fills up the semilunar valves of the aortic valve, entering coronaries
Where does the subclavian artery turn into the axillary artery?
At the lateral border of first rib
At what level of the spine does the vertebral artery enter the transverse foramen?
C6
What are the 2 sources for blood to the cns?
The vertebral artery
The internal carotid
Internal carotid artery supplies the anterior and middle aspects of the brain. Vertebral artery supplies the posterior brain.
What does the common carotid ascend the neck with?
Internal jugular vein
Vagus nerve
What happens to the common carotid between the hyoid bone and upper thyroid cartilage?
It bifurcates into internal and external carotid arteries.
What artery supplies all the visceral, musculoskeletal and dental structures of the head and neck apart from the brain and orbit?
The external carotid artery. Internal head structures are supplied by the internal carotid artery.
What artery supplies the orbit? Where does it come from?
Opthalmic artery that branches off from the internal carotid
What is the terminal branch of the external carotid?
The superficial temporal
What is a major source of blood for deep skull cavity, part of the orbit, teeth, muscles of mastication, and the dura mater?
Maxillary artery (from the external carotid artery)
What supplies the anterior part of brain?
The internal carotid. This supplies the anterior and middle aspects of the brain. Vertebral artery supplies the posterior brain.
What do the 2 vertebral arteries form?
The basilar artery
What supplies the posterior part of brain?
The basilar artery from the 2 vertebral arteries
What purpose does the circle of Willis serve?
It encircles the pituitary gland and the optic chiasm. It unites the brain’s anterior and posterior blood supply, equalizes the 2 hemisphere’s blood pressures, and provides alternative routes for blood to reach the brain if a vessel becomes compromised
From what artery does the superior cerebellar branch?
Basilar
What branches off from the vertebral artery?
Posterior and anterior spinal arteries
Posterior inferior cerebellar
What branches off from the basilar artery?
Superior cerebellar
Anterior and middle inferior cerebellar
Labyrinthine
Pontine
What drains blood from scalp and face?
External jugular. Versus the internal carotid artery supplies internal head structures (like the brain).