Anatomy Quiz 4 7

• • Common Carotid
• • Subclavian
• • Collateral circulation (anastomoses)

• • Vertebral artery
• • Thyrocervical trunk
• • -----inferior thyroid
• • ----------ascending cervical
• • -----transverse cervical
• • -----suprascapular
• • Internal thoracic
• • Costocervical trunk
• • -----deep cervical
• • -----superior intercostal
• • Dorsal scapular

• • Transverse cervical
• • Suprascapular
• • Inferior thyroid

• • Deep cervical
• • Superior intercostal

• • Right subclavian - brachiocephalic a.
• • left subclavian- direct branch of the aorta

• • travel lateral to the trachea into the root of the neck, passing between the anterior and middle scalenes
• • Divided into 3 parts based on its relationship to the anterior scalene

• • Branches
• • -----Vertebral artery
• • -----Thyrocervical trunk
• • beginning of the subclavian to the medial border of the ant scalene

• • costocervical trunk
• • located posterior to the anterior scalene

lateral margin of the ant scalene to the lateral border of the 1st rib, where it becomes the axillary a.

branch of the 1st part of the subclavian along the medial aspect of the ant scalene m.

travels along the medial border of the anterior scalene posterior to the carotid sheath and anterior to the vertebral a. to the thyroid gland along with the recurrent laryngeal n. it gives rise to the inferior laryngeal a. to the larynx and the ascending cervical, which helps supply the muscles in the area and sends branches to the vertebral a.

• Inferior laryngeal
• Ascending cervical

Brings blood to larynx

Brings blood to muscles in the area and sends branches to vertebral artery