The first cervical vertebra in humans is known as the

1.	atlas	2.	axis
3.	vertebra prominens	4.	synsacrum

The second cervical vertebra in humans is known as the
1. atlas.
2. axis.
3. vertebra prominens.
4. synsacrum.

The opening in a vertebra that is formed by a neural arch and back portion of a vertebral body and through which the spinal cord passes is called as:
1. intervertebral foramen.
2. vertebral canal.
3. vertebral foramen.
4. formen magnum.

The number of pairs of vertebrosternal ribs in humans are:

Situated between the two hip bones of the pelvis, sacrum is a triangular bone in the lower back formed from fusion of:

The cartilaginous section at the lower end of the sternum, which is not attached to any ribs, and gradually ossifies during adult life is:

1. manubrium.

2. body.

3. xiphoid process.

4. clavicular surface.

The number of pairs of vertebrochondral ribs in humans are:

The cartilages that attach the ribs to the sternum are called as:
1. elastic cartilages
2. costal cartilages
3. calcified cartilages
4. fibrous cartilages

The atlas vertebra of humans:
1. articulates with temporal bone.
2. does not have a body.
3. has an odontoid process.
4. does not have a vertebral foramen.

All thoracic vertebrae:

1. lack a transverse process.

2. lack a body.

3. have facets for ribs.

4. have transverse foramen.