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Catalyst Questions

Catalyst Questions. What is the purpose of the structures listed: Nail body Dermal Papilla Lunule Hair Bulb Cortex Hair Root Medulla Hair Shaft Cuticle of hair Hair Follicle Cuticle of nail Today’s Lesson Topic to add to interactive notebook: Glands!. Cutaneous Glands.

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Catalyst Questions

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  1. Catalyst Questions • What is the purpose of the structures listed: • Nail body Dermal Papilla • Lunule Hair Bulb • Cortex Hair Root • Medulla Hair 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 • Merocrine • 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 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.

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