Axillary Artery

Used to divide the axillary artery into its three parts

What our notes say

Used to divide the axillary artery into its three parts (Aponeurosis — Anatomy Question Bank)
Formation: ventral rami of C5–T1 → form the upper (C5, C6), middle (C7), and lower (C8, T1) trunks → each trunk splits into anterior and posterior divisions → divisions recombine into the lateral, posterior, and medial cords (named for their relation to the axillary artery) (Aponeurosis — Anatomy Question Bank)
Origin: medial and lateral cords of brachial plexus (C5–T1); roots unite anterior to the third part of the axillary artery. (Master First-Year Anatomy: Must-Know Essays & Key Concepts)
Q16 — UPPER LIMB BLOOD SUPPLYSubclavian artery → (at lateral border 1st rib) → axillary artery → (at lower border teres major) → brachial artery → (in cubital fossa) → radial + ulnar arteries. (Master First-Year Anatomy: Must-Know Essays & Key Concepts)