**Question:** All arteries involved in anastamosis around scapula except:

A. Subclavian artery
B. Axillary artery
C. Costoclavicular artery
D. Thoracodorsal artery

**Core Concept:** Anastomosis is a process where two or more blood vessels join together to form a continuous network, ensuring blood flow continuity. In the context of the scapular region, these connections help maintain blood supply in case of a vessel occlusion or injury.

**Why the Correct Answer is Right:**

Option A (Subclavian artery) is incorrect because it is a major artery that supplies blood to the upper limb and does not have a specific role in the anastomosis network around the scapula.

Option B (Axillary artery) is incorrect because it is the primary artery supplying blood to the arm and is essential for the anastomosis around the scapula.

Option C (Costoclavicular artery) is incorrect as it is a smaller branch from the subclavian artery and does not play a significant role in the anastomosis network around the scapula.

Option D (Thoracodorsal artery) is incorrect because it is a branch from the first, second, and third intercostal arteries and is not directly involved in the anastomosis around the scapula.

**Why Each Wrong Option is Incorrect:**

Option A (Subclavian artery) is involved in the formation of the axillary artery and brachial plexus, not in the anastomosis around the scapula.

Option B (Axillary artery) is essential for the formation of the anastomosis around the scapula as it is connected to the brachial plexus and supplies the arm, which is crucial for blood flow around the scapula.

Option C (Costoclavicular artery) is not directly involved in the formation of the anastomosis around the scapula, as it is a minor branch from the subclavian artery.

Option D (Thoracodorsal artery) is formed by the first, second, and third intercostal arteries and is not directly involved in the anastomosis around the scapula.

**Clinical Pearl:** Understanding the anastomosis network around the scapula allows for proper assessment and management of injuries or occlusions within this region, ensuring prompt and effective blood flow restoration to the upper limb.