1 / 21

Integumentary System (Skin)

Integumentary System (Skin). Integumentary System. Structure: Epidermis: Stratum corneum: dead cells, mostly keratin. Stratum lucidum: dead keratyoncytes; not present in all the skin. Stratum granulosum: Lamelated granules (waterproofing) Keratohyaline granules.

miyoko
Télécharger la présentation

Integumentary System (Skin)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Integumentary System(Skin)

  2. Integumentary System • Structure: • Epidermis: • Stratum corneum: dead cells, mostly keratin. • Stratum lucidum: dead keratyoncytes; not present in all the skin. • Stratum granulosum: • Lamelated granules (waterproofing) • Keratohyaline granules. • Stratum spinosum: prekeratin. • Stratum basale • Dermis • Papilar layer • Reticular layer • Function • Protection • Insulation • Chemical damage • Bacterial invasion • Dehydration • Temperature regulation • Secretory • Urea, salts, water • Synthesis of vitamin D • Sensory

  3. Figure 5.1

  4. Cells in the Epidermis • Keratynocytes • Produce keratin • Melanocytes • Produce melanin pigment • Langerham’s cells • Immunity • Merkel cells • Touch receptors

  5. Cells in the Dermis • Meissner’s corpuscles • Papillary layer (areolar conective tissue): pain and touch receptor. • Paccinian corpuscles • Reticular layer (dense irregular): pressure receptor.

  6. Figure 5.2

  7. "Cher Likes Getting Skin Botoxed" (from superficial to deep) • "Before Signing, Get Legal Counsel" (from deep to superficial) • "Before Sex Get Latex Condoms (from deep to superficial)

  8. Figure 4.37

  9. Accesory organs of the skin • Nails • Hair • Hair • Follicle • Arrector pilli muscle • Cutaneous glands • Sebaceous: skin moisture. • Sweat • Ecrine (merocrine sweat glands) temperature regulation through perspiration. Appocrine:axillary and genital area (fats, water, salts, urea): pheromones?

  10. Nails Figure 5.6

  11. Figure 5.4

  12. Hair (transverse view) Figure 5.5a, b

  13. Hair follicle (longitudinal view) Figure 5.5c, d

  14. Figure 5.3

  15. Figure 5.3a

  16. Sweat gland Figure 5.3b

More Related