A&P Chapter 5

Home > Flashcards > Print Preview

The flashcards below were created by user yazclapper on FreezingBlue Flashcards. What would you like to do?

  1. What layer of the skin is vascularized?
    Only the dermis
  2. Keratinocytes
    • Chief role is to produce keratin: the fibrous protein that helps give the epidermis its protective properties
    • connected to one another by desmosomes
    • arise in the deepest part of the epidermis (stratum basale)
    • undergo continuous mitosis
  3. Melanocytes
    • Synthesize the pigment melanin
    • spider shaped epithelial cells
    • found in the deepest layer of epidermis
  4. Merkel disc
    functions as a sensory receptor for touch
  5. Langerhans cell
    • Epidermal dendritic cell
    • ingest foreign substances and are key activators of our immune system
  6. What are the layers of the skin?
    • Big Sexy Girls Like Cake
    • Stratum Basale: single row of stem cells - a continually renewing cell population
    • Stratum Spinosum: web like system of intermediate filaments, mainly tension resisting bundles of pre-keratin filaments
    • Stratum Granulosum: consists of 3-5 cell layers in which keratinocytes appearance changes drastically and the process of keratinization begins
    • Stratum Lucidum: Only in thick skin
    • Stratum Corneum: outer most 20-30 layers; provides a durable overcoat
  7. What are the two layers of the dermis?
    • Richly supplied with nerve fibers, blood vessels, and lymphatic vessels.
    • Paillary: areolar connective tissue; friction ridges
    • Reticular: 80% of the thickness of the dermis
  8. What are the three major skin markings?
    • Friction ridges: increase friction and enhance the gripping ability of the fingers and feet
    • Cleavage / tension lines: separations or less dense regions between bundles of connective tissue
    • Flexure lines: dermal folds that occur at or near joints, where the dermis is tightly secured to deeper structures (deep creases in the palm).
  9. What three pigments contribute to skin color?
    • Melanin: color ranges from yellow to tan to yellowish brown; found only in the deeper layers of the epidermis; freckles and moles are local accumulations of melanin
    • Carotene: accumulates in the stratum corneium and in fatty tissue of the hypodermis; yellowish tinge of the skin
    • Hemoglobin: pinkish hue of fair skin reflects the crimson color of the oxygenated pigment in RBC's.
  10. Sudoriferous glands
    • Sweat glands
    • Merocrine sweat glands with the secretory part coiled deep in the dermis
    • Secretory cells are associated with myoepithelial cell's - specialized cells that contract when stimulated by the nervous system
    • major role is to prevent overheating of the body
  11. Apocrine sweat glands
    • merocrine glands that secrete their product by exocytosis
    • Their ducts empty into hair follicles
  12. Ceremonious Glands
    modified apocrine glands found in the lining of the external ear canal
  13. Sebaceous glands
    • simple branched alveolar glands that are found all over the body except in the thick skin of the palms and soles
    • Secrete sebum
  14. Vellus hair
    body hair of children and and adult females
  15. Terminal hair
    Coarser, longer hair of the eyebrows and scalp

Card Set Information

A&P Chapter 5
2009-12-09 22:33:21
Anatomy and Physiology

The integumentary System
Show Answers:

What would you like to do?

Home > Flashcards > Print Preview