Question

THe lines (pictured right) along which surgeons cut to avoid tearing parallel bundles of collagen fibers in the skin are:

a. dermal papillae

b. friction ridges

c. flexure lines

d. cleavege lines

THese lines are found in the:

a. epidermis

b. papillary dermis

c. reticular dermis

d. hypothermis

Please explain why. Thank you