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What factors are responsible for facial markings?   a. nature   b. extrinsic   c. nurture   d. intrinsic

Exposure to the sun causing a darker complexion, more lines in the skin, and firmer skin texture are examples of  _____ factors responsible for facial markings.

The _____ suture fuses the occipital bone to the two parietal bones.

The age and muscle tonicity of an individual is consider a(n) _____ factor responsible for facial markings.

What is the name given to the imaginary vertical line dividing the body equally into right and left halves?   a. mid-sagittal   b. sagittal   c. oblique   d. median

The _____ is a grove at each end of the line of closure of the mouth.

Select the name(s) given to the shallow and curving groove below the medial corner of the eyelids.   a. interciliary sulci   b. oblique palpebral sulcus   c. superior palpebral sulcus   d. inferior palpebral sulcus

Due to its actions, the _____ muscle is colloquially known as the frown muscle.

The _____ muscle raises the upper eyelid.

This muscle depresses the skin of the forehead inferiorly at the medial end of the eyebrows and wrinkles in a transverse and vertical form the glabellar skin.