The primary curvatures of the spine serves mainly to
A)accommodation of the thoracic and abdominopelvic viscera.
B)aligning the weight of the head over the legs.
C)shifting the weight of the trunk to the hips and lower extremities.
D)increasing the ability to extend the limbs.
E)take weight off of the hips.

Question

Quizplus · Accepted Answer

The primary curvatures of the spine (thoracic and sacral) are concave anteriorly and serve to accommodate the thoracic and abdominopelvic viscera, allowing for efficient breathing and digestion. They do not directly align the weight of the head over the legs or shift weight to the hips and lower extremities, which is the function of the secondary curvatures (cervical and lumbar). They also do not increase the ability to extend the limbs or take weight off of the hips.

The Primary Curvatures of the Spine Serves Mainly to