What are the points for articulation of pelvic and pectoral girdles?

Explanation

### Step-by-Step Solution:

1. **Understanding the Pectoral Girdle**:
- The pectoral girdle consists of two main components: the clavicle (collarbone) and the scapula (shoulder blade). Each half of the pectoral girdle includes one clavicle and one scapula.

2. **Components of the Scapula**:
- The scapula has a flat, triangular body and features an elevated ridge known as the spine. This spine extends into a flat, expanded process called the acromion process.

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