Vessels Flashcards
3 arteries branching off the aorta
- ) brachiocephalic
- ) left common carotid
- ) left subclavian
arteries branching off brachiocephalic artery
- ) right common carotid
2. ) right subclavian
common carotid arteries
- one on each side- R from brachiocephalic; L independently
- arise from brachiocephalic
- travel anterolateral up neck, along trachea
- branch into internal/external carotids
internal carotids
- arise from common carotid
- pass medial to angle of mandible and enter brain thru carotid canal
- supplies orbits and 80% of cerebellum
- gives rise to
1. ) ophthalmic a.
2. ) anterior cerebral a.
3. ) middle cerebral a.
external carotids
- arise from common carotid
- ascends the side of head external to cranium and supplies superficial regions of head
- gives rise to
1. ) superior thyroid artery
2. ) lingual artery
3. ) facial artery
4. ) occipital artery
5. ) maxillary a.
6. ) superficial temporal a.
superior thyroid a.
- external carotid
- to thyroid gland and larynx
lingual a.
- external carotid
- to tongue
facial artery
- external carotid
- to skin and face muscle
occipital artery
- external carotid
- to posterior scalp
maxillary a.
- external carotid
- to teeth, maxilla, oral cavity, external ear
superficial temporal a.
- external carotid
- to chewing muscles, nasal cavity, lateral aspect of face, most of scalp, and dura mater
ophthalmic artery
- internal carotid
- to orbit, nose, forehead
anterior cerebral artery
- internal carotid
- to medial aspect cerebral hemisphere
middle cerebral artery
- internal carotid
- travels in lateral sulcus of brain
- supply sulcus and branches supply regions of frontal, temporal, and parietal lobes
vertebral arteries
- arise from R and L subclavian arteries
- travel up neck through transverse foramina (C1-6)
- enter cranial cavity thru foramen magnum
- converge to form basilar artery at anterior brainstem
basilar artery
- arises from converging of vertebral arteries at anterior of brainstem
- branches supply cerebellum, pons, and inner ear
- at pons midbrain junction, divides and flows into cerebral arterial circle
cerebral arterial circle (circle of willis)
- surrounds pituitary gland and optic chiasm
- receives blood from internal carotid and basilar arteries
- most people lack some of its components
- crucial for understanding blood clots, aneurysms, stroke, and brain function
cerebral arterial circle components
- ) two posterior cerebral arteries
- ) two anterior cerebral arteries
- ) single anterior communicating artery
- ) two posterior communicating arteries
posterior cerebral arteries
- arise from basilar artery and sweep posteriorally to rear of brain
- blood supply for inferior and medial regions of temporal and occipital lobes
- blood supply for midbrain and thalamus
anterior cerebral arteries
- arise from internal carotids
- travel anteriorly
- arch posteriorly over corpus callosum as far as parietal lobe
- give off branches to parietal and frontal lobe
anterior communicating artery
-short anastomosis between R and L anterior cerebral arteries
posterior communicating arteries
-small anastomoses between posterior cerebral and internal carotid arteries
major veins of neck
- 3 on each side
1. ) internal jugular
2. ) external jugular
3. ) vertebral vein - responsible for draining head and neck
- all empty into subclavian vein
internal jugular vein
- receives most of blood into brain
- travels deep to sternocleidomastoid
- picks up blood from facial v, superficial temporal v, and superior thyroid v