Do Now 9/8/14 What are the layers of the epidermis from most superficial to most deep? What are the layers of the dermis from most superficial to most deep? In which dermis sublayer can the hair follicle and glands be found? How can the glands in the integument be classified – exocrine or endocrine? Defend your answer.

Exocrine Glands Sebaceous Glands Sweat Glands Apocrine: Armpit Sweat Glands Located in reticular layer of dermis Contain sweat gland duct Sebaceous Glands Oily, waxy secretion of sebum onto hair follicle and hair itself Stimulated by hormones around puberty Lubricates skin and hair from becoming dry, brittle, cracked Merocrine Most numerous Secretes sweat directly on skin’s surface Apocrine Release secretions into hair follicles in the axillary, pubic, and anal regions Secretion is viscous and cloudy and has a distinct noticeable odor (begins around puberty)

Explain why adolescents have greasy skin when they hit puberty Explain why adolescents have greasy skin when they hit puberty. Which gland(s) is/are responsible for teenagers’ oily appearance? When you apply deodorant, it is designed to mask your B.O. Which gland is responsible for these smelly secretions? And why do you smell so bad?

Exit Ticket What type of sweat gland activity are we measuring? (Type of gland – be specific) Defend your answer. How did sweat gland activity compare between activities when the environmental temperature was changed or the body temperature was changed?

Homework Integumentary Poster due Wed Label hair follicle and its corresponding structures Include 1-2 sentences describing the purpose of hair Label sweat and sebaceous glands Include 1-2 sentences comparing merocrine and apocrine glands Sweat Gland Distribution Lab due Wed Test on Friday