First rib anatomy

this image shows the anatomy of the first rib from superior view displaying its different features and parts

showing:
1. head of the first rib
2. neck of the first rib
3. tubercle of the first rib
4. site of attachment of middle scalene muscle
5. site of attachment of the serratus anterior muscle
6. site of attachment of anterior scalene muscle
7. groove for subclavian artery
8. groove for subclavian vien