integumentary system

• epidermis - outer layer of the skin, composed of dead cells and keratinocytes
• keratinocyte - type of cell found in the epidermis that produces keratin
• epidermis layers

  • Corneum
  • Lucidum
  • Granulosum
  • Spinosum
  • Basale
• lucidum - thin layer between corneum and granulosum, contains lipids
• corneum - thickest part of the epidermis, made up of dead cells filled with keratin
• granulosum - layer below lucidum, where melanosomes are produced
• melanocytes - produce melanin, which is a pigment that gives color to skin
• dermis - connective tissue layer of the skin, composed of collagen and elastin fibers
• hypodermis- deepest layer of the skin, contains fat and connective tissue
• called the dermis, contains sweat glands, blood vessels, nerve endings (sense receptors), and the bases of

  hair and nails.
• The outer layer, the epidermis, is only a few cells thick; it contains pigments, pores, and ducts,