Changes

====Wool Hairs====

====Wool Hairs====

These are thin, wavy, soft hairs that form the '''undercoat of animals'''.  They are often much more numerous than the tough guard hairs and usually shorter. Their number increases in '''winter''' when they serve to keep the body warm.

These are thin, wavy, soft hairs that form the '''undercoat of animals'''.  They are often much more numerous than the tough guard hairs and usually shorter. Their number increases in '''winter''' when they serve to keep the body warm.

===Tactile Hairs====

====Tactile Hairs====

Tactile hairs are associated with a sensory function and are much '''thicker and stiffer''' than other hairs.  They are mainly found on the face and can also be referred to as '''''whiskers''''' or '''''vibrissae'''''.  Their '''follicles are much deeper''' into the hypodermis than guard or wool hairs and possess a '''venous sinus and nerve endings with mechanoreceptors'''.  During embryonic development, they appear before other hair types.

Tactile hairs are associated with a sensory function and are much '''thicker and stiffer''' than other hairs.  They are mainly found on the face and can also be referred to as '''''whiskers''''' or '''''vibrissae'''''.  Their '''follicles are much deeper''' into the hypodermis than guard or wool hairs and possess a '''venous sinus and nerve endings with mechanoreceptors'''.  During embryonic development, they appear before other hair types.

These hairs are mostly found on the '''face, near the eyes and on the upper lip'''.

These hairs are mostly found on the '''face, near the eyes and on the upper lip'''.