Question

What is the annular space? where is it narrowest?

a) The space between two adjacent vertebrae; it is narrowest in the lumbar region
b) The space between the atria and ventricles of the heart; it is narrowest at the tricuspid valve
c) The space between the carpal bones; it is narrowest at the scaphoid bone
d) The space between the vocal cords; it is narrowest at the glottis

Answer 1

The annular space is the space between adjacent vertebrae, filled by intervertebral discs. It is narrowest in the lumbar region.

Step-by-step explanation:

The annular space refers to the space between the bodies of adjacent vertebrae, which is filled by an intervertebral disc. This disc provides padding, weight-bearing ability, and enables movement of the vertebral column. The annular space is progressively narrower in the lumbar region due to the higher body weight it carries.