Lecture 12: Great Vessels PDF

 Branches of aortic arch 1. Brachiocephalic artery: which give Right subclavian & Right common carotid 2. Left Subclavian 3. Left common carotid wy Common Carotid artery Origin...

 Branches of aortic arch 1. Brachiocephalic artery: which give Right subclavian & Right common carotid 2. Left Subclavian 3. Left common carotid wy Common Carotid artery Origin  Right common carotid arises from brachiocephalic artery  Left common carotid arises from Aortic Ach da Course  It passes in carotid sheath under cover of sternomastoid muscle Termination  It gives Internal carotid & External Carotid at upper border of thyroid cartilage en “Opposite disc between C3 & C4” Internal Carotid artery Origin: Terminal branch of common carotid at level of disc between C3, C4 Course H  It passes in carotid sheath  Enter the skull through carotid canal Supply: Brain & eyes R. N.B: Pulse of common Carotid can be felt anterior to sternomastoid just below mandible D Anatomist “great vessels”  External Carotid Origin: Terminal branch of common carotid at level of disc between C3, C4 End: Inside the parotid gland, it gives Superficial temporal & Maxillary Branches: wy o From the anterior surface: it gives 1. Superior Thyroid “1st branch”: to thyroid gland 2. Lingual: to tongue da 3. Facial: to face o From the medial surface: it gives 4. Ascending pharyngeal “2nd branch” en o From the posterior surface: it gives 5. Occipital: to scalp H 6. Posterior Auricular: to scalp o Terminal branches: R. 7. Superficial temporal: To face & scalp 8. Maxillary: to face N.B: Pulse of facial artery can be felt against the lower border of mandible D N.B: Pulse of Superficial temporal artery can be felt anterior to the auricle while crossing the zygomatic arch Anatomist “great vessels”  External jugular vein Beginning: Union of Posterior auricular vein & Posterior division of retromandibular vein wy Course: Descends in the neck superficial to sternomastoid muscle Termination: In Subclavian vein da Tributaries: en 1. Transverse cervical vein 2. Suprascapular vein 3. Anterior jugular vein H R. D Anatomist “great vessels”  Internal jugular vein Beginning Continuation of sigmoid sinus at jugular foramen Course: wy  Descend in the neck deep to sternomastoid  Pass inside upper part of carotid sheath with internal carotid & last 4 cranial nerves da  Pass inside lower part of carotid sheath with common carotid & vagus nerve en Termination: Joins subclavian vein to form brachiocephalic vein Tributaries 1. Inferior Petrosal sinus 2. Common facial vein 3. Lingual vein H R. 4. Pharyngeal vein 5. Superior thyroid vein D 6. Middle thyroid vein Clinical importance: it is used for insertion of central venous catheter Anatomist “great vessels”