(i)Draw a neat and labelled diagram of pectoral girdle with arm.
(ii) Based on the diagram drawn above in (i), give a suitable term for each of the following descriptions :
1. Curved anterior bone of the shoulder (pectoral) girdle in vertebrates.
2. A shallow cavity of scapula that articulates with the head of the humerus.
3. Part of the skeleton that helps to articulate the limb bones to the main skeleton
4. Total number of bones present in the human body.
5. A long bone of the upper arm that articulates with the glenoid cavity of the scapula.
6. Irregular, small bones that look like pebbles and are present in two layers.
7. A large cup-shaped articular cavity of the hip bone which fits the large, round head of the thigh bone.

Explanation

### Step-by-Step Text Solution

**(i) Draw a neat and labelled diagram of the pectoral girdle with arm.**

1. **Draw the Clavicle**: Start by sketching the clavicle (collarbone), which is a curved bone that connects the arm to the body. It should be positioned horizontally at the top of your diagram.

2. **Draw the Scapula**: Below the clavicle, draw the scapula (shoulder blade). It has a triangular shape and should be positioned on the back side of the diagram.

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