Chapter 5 - The Integumentary System Flashcards
Layers of the integumentary system, from most superficial to deepest:
Epidermis, dermis, hypodermis, subcutaneous tissue
Five layers of the epidermis, most superficial to deepest:
Stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, stratum basale
What are the most abundant cells in the stratum basale?
Keratinocytes
Cells found in the stratum basale:
Keratinocytes, langerhans cells, melanocytes, tactile (or Merkel) cells
Which layer of the epidermis creates calluses?
Stratum lucidum
Stratum lucidum is only found where on the body?
Areas with thick skin (palms of the hands, soles of the feet, elbows, etc)
Keratinization of the entire cell of the stratum corneum causes what?
The death of the uppermost cells, leading to hardening of the skin
The dermis is composed of what kind of connective tissue?
Dense irregular connective tissue
Epidermal ridges are commonly known as what?
Fingerprints
Is the dermis vascular or avascular?
Vascular