1. Catalyst Questions What is the purpose of the structures listed: –Nail body Dermal Papilla –LunuleHair Bulb –CortexHair Root –MedullaHair Shaft –Cuticle of hair Hair Follicle –Cuticle of nail Today’s Lesson Topic to add to interactive notebook: Glands!

2. Cutaneous Glands Mr. Z

3. Want extra credit? Bring in boxes of tissue Worth 5 points per box For a total of 15 points (can only bring in three)

4. What’s Going On In Science?

5. As we continue remember WHY this class is important to YOU

6. Objectives You will be able to name two types of sweat glands and describe the structure and function of each. You will be able to describe the location, structure, and function of sebaceous glands.

7. Cutaneous Glands The skin has five types of glands We’re only going to focus on two types: –Sweat Glands –Sebaceous Glands

8. Sweat Glands Sweat glands, or sudoriferous glands, are of two kinds 1.Merocrine 2.Apocrine

9. Merocrine Glands AKA eccrine glands the most numerous type of gland and produce watery perspiration that serves primarily to cool the body About 3-4 million of them in our body It is a simple tubular gland with a duct leading to a sweat pore on the skin surface. The duct is lined by a stratified cuboidal epithelium in the dermis and by keratinocytes in the epidermis. Merocrine Gland

10. Apocrine Glands Occur in the groin, anal region, axilla, and areola and in mature males, they also occur in the beard area. Their ducts lead into nearby hair follicles rather than opening directly onto the surface. The lumen of the apocrine gland is much larger than that of the merocrine gland

11. Apocrine Glands, cont’d Apocrine sweat is thicker and milkier than sweat Respond especially to stress and sexual stimulation. Do not develop until puberty Function is to secrete chemicals called sex phermones, which exert subtle effects on the sexual behavior and physiology of other people.

12. Sebaceous Glands Produce an oily secretion called sebum. They are flask shaped, with short ducts that usually open unto a hair follicle. They have very little visible lumen. Their secretion consists of broken-down cell that are replaced by mitosis at the base of the gland. Sebum keeps the skin and hair from becoming dry, brittle, and cracked. The sheen of well-brushed hair is due to sebum distributed by the hair brush

13. Sebaceous Glands

14. Sketches In you A&P atlas, you should sketch and then label the following glands, make sure to include function!!: An apocrine gland A merocrine gland A sebaceous gland

15. Independent Work/Homework Skin diagram cut out/label Gland half sheet– answers need to be done on EVEN pages –This then needs to be added to your table of contents –REMEMBER we do this everyday so that we are organized!! –Make sure to bring colored pencils for our drawings, you WILL NEED them next time.