common carotid artery- right/left differences -right (brachiocephalic trunk)split: external and internal carotidleft (no brachiocephalic.)external carotid artery (22.13) – gets blood to tissue outside of the skull. Has several branches…1. facial – serves the face.2. Occipital – lower lateral & posterior3. maxillary – upper part of the face.4. superficial temporal – upper lateral & superiorInternal Carotid Artery (22.14a)Carotid sinus – blood pressure & blood chemistry. Tells body if it needs to breath faster to get more oxygen.Carotid canal of skullOphthalmic - orbitAnterior, middle, posterior cerebral arteriesCircle of willis – cerebral arterial circle and cerebral communicating arteriesVeins (&sinuses) of headEmbedded in brain membranes (meninges) = VENOUS SINUSES- Venous Sinuses (22.21)superior and inferior sagittal sinusesstraight sinustransverse sinussigmoid sinus- Veinsinternal jugular veinanastomosisexternal jugular vein (superficial, close to skin)temporal vn.maxillary vn.FacialOccipitalVertebral veinBrachiocephalic right and left vein (figure 22.22)Superior vena cavaarteries of head and neck 03/26/2014common carotid artery- right/left differences - oright (brachiocephalic trunk)split: external and internal carotidoleft (no brachiocephalic.)-external carotid artery (22.13) – gets blood to tissue outside of the skull. Has several branches…1. facial – serves the face.2. Occipital – lower lateral & posterior3. maxillary – upper part of the face. 4. superficial temporal – upper lateral & superior -Internal Carotid Artery (22.14a)oCarotid sinus – blood pressure & blood chemistry. Tells body if it needs to breath faster to get more oxygen. oCarotid canal of skulloOphthalmic - orbitoAnterior, middle, posterior cerebral arteriesCircle of willis – cerebral arterial circle and cerebral communicating arteriesVeins (&sinuses) of head -Embedded in brain membranes (meninges) = VENOUS SINUSES- Venous Sinuses (22.21)-superior and inferior sagittal sinuses-straight sinus-transverse sinus-sigmoid sinus - Veins-internal jugular veinoanastomosis-external jugular vein (superficial, close to skin) otemporal vn. omaxillary vn.oFacialoOccipital -Vertebral veinBrachiocephalic right and left vein (figure 22.22)-Superior vena