Identify the basic skeletal structures of dog or cat.

The basic skeletal structures of a dog or cat include:

1. Skull: This is the bony structure that forms the head in vertebrates. It supports the structures of the face and provides a protective cavity for the brain.

2. Spine: Also known as the vertebral column, it is made up of individual bones called vertebrae. It supports the body and protects the spinal cord.

3. Ribs: These are the long curved bones which form the rib cage. They protect the lungs, heart, and other internal organs of the thorax.

4. Pelvis: This is the bony structure located at the base of the spine. It supports the weight of the body and is where the hind limbs attach.

5. Limbs: Dogs and cats each have four limbs. Each limb consists of several parts including the humerus, radius, and ulna (forelimbs) and femur, tibia, and fibula (hind limbs).

6. Paws: These are the extremities of the limbs and contain small bones called phalanges.

7. Tail: The tail is an extension of the spine and contains several smaller vertebrae.

These are the basic skeletal structures, but there are many more smaller bones and details that make up the complete skeletal system of dogs and cats.