All are true regarding axillary aery except?
**Core Concept**
The axillary artery is a continuation of the subclavian artery, extending from the outer border of the first rib to the lower border of the teres major muscle. It is a vital blood vessel that supplies oxygenated blood to the upper limb, shoulder, and chest wall.
**Why the Correct Answer is Right**
The axillary artery is divided into three parts based on its relationship with the pectoralis minor muscle. Each part has a distinct set of branches that supply the surrounding muscles, bones, and skin. The first part (proximal to the pectoralis minor) gives off the superior thoracic artery, the second part (behind the pectoralis minor) gives off the thoracoacromial and lateral thoracic arteries, and the third part (distal to the pectoralis minor) gives off the subscapular, anterior circumflex humeral, and posterior circumflex humeral arteries.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incomplete and cannot be evaluated.
**Option B:** This option is not provided, but if it is a statement about the axillary artery, it should be evaluated based on the anatomy and physiology of the vessel.
**Option C:** This option is not provided, but if it is a statement about the axillary artery, it should be evaluated based on the anatomy and physiology of the vessel.
**Option D:** This option is not provided, but if it is a statement about the axillary artery, it should be evaluated based on the anatomy and physiology of the vessel.
**Clinical Pearl / High-Yield Fact**
The axillary artery is often used as a site for blood sampling and cannulation due to its accessibility and proximity to the upper limb. However, it is essential to be aware of the anatomical variations and the risk of injury to the surrounding nerves and vessels.
**Correct Answer:** Not provided.