1 / 18

The Integumentary System

The Integumentary System. Ch. 5. Objectives. Identify various parts of the integument Know the functions of the integumentary system Know the structural composition of hair and nails Understand how skin disorders like cancer and burns are classified and what occurs during these disorders.

maite-jimenez
Download Presentation

The Integumentary System

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. The Integumentary System Ch. 5

  2. Objectives • Identify various parts of the integument • Know the functions of the integumentary system • Know the structural composition of hair and nails • Understand how skin disorders like cancer and burns are classified and what occurs during these disorders

  3. The Integumentary System • Includes the skin (integument) and the accessory organs found within the skin

  4. Skin: Integumentary System • Functions: prevent dehydration, protect from injury, serve as defense against microorganisms, regulate body temperature, make vitamin D, provide sensation, nonverbal communication • Structure: • Epidermis: outer layer, stratified squamous epithelial cells, no blood vessels, specialized keratinocytes and melanocytes • Dermis: deeper layer, support tissues, fibers

  5. Skin: Integumentary System

  6. Epidermis • Keratinized stratified squamous epithelium • Cell types • Regenerative stem cells • Keratinocytes • Melanocytes • Tactile cells • Dendritic cells

  7. Layers of the Epidermis • From deep out • Stratum basale • Stratum spinosum • Stratum granulosum • Keratohyaline granules • filaggrin • Lamellated granules • Stratum lucidum • Thick skin only • Stratum corneum pgbeautygroomingscience.com

  8. Skin Histology nku.edu

  9. Skin Color • Melanin • The more produced, the darker the color • Hemoglobin • Reddish – pink skin tones • Carotene • Yellow hue to skin • Concentrates in stratum corneum

  10. Dermis • Connective tissue layer deep to the epidermis • Attached to the epidermis via dermal papillae • Interlocking arrangement with epidermal ridges • Two layers • Papillary • Areolar • Reticular • Dense irregular

  11. Accessory Structures of Dermis • Hair: shaft, follicle • Smooth muscle: attached to hair follicle, raises hair to upright position • Oil glands/sebaceous glands: secretion moistens and softens skin

  12. Accessory Structures of Dermis (cont.) • Sweat glands: secrete sweat, help in temperature regulation • Apocrine and merocrine • Blood vessels: supply nutrients, remove waste, assist in temperature regulation • Sensory nerve endings: for heat, cold, touch, deep pressure, vibration

  13. Dermis healthguide.howstuffworks.com

  14. Hypodermis • Binds skin to underlying tissue • Functions as padding and insulation • Subcutaneous fat • Readily absorbs drugs given by hypodermic injection • Highly vascular

  15. Hair • Pili (sing. Pilus) are composed of hard, dead keratinized cells • Grow from a follicle that is typically found in the dermis • Hair divided into three zones • Bulb which lies in the follicle • Root • Shaft keratin.com

  16. Nails • Scale-like modifications of the epidermis (startum corneum) • Dead cells full of parallel hard keratin emedicinehealth.com

  17. Skin Disorders • Skin Cancer • One of the most prevalent cancers • UV radiation damages cells • Three types • Basal cell carcinoma • Most common, stratum basale • Squamous cell carcinoma • Stratum spinosum • Malignant melanoma • Most deadly, melanocytes metrohealth.org

  18. Burns • Classified based on depth of tissue involvement • First degree • Epidermis • Red, slight swelling • Second degree • Epidermis and into part of the dermis • Red to white, more painful • Regeneration of epidermis possible • Third degree • Full-thickness, completely through dermis and beyond • Tan to brown, danger of fluid loss and infection • Generally require skin grafts to replace dermis and epidermis burn-recovery.org

More Related