Ch.7 - Skin and Membranes Flashcards
(32 cards)
Composed of epithelial tissue and an underlying layer of connective tissue
Epithelial Membranes
Composed exclusively of various types of connective tissue
Connective Tissue Membranes
The skin
Cutaneous Membrane
Simple squamous epithelium on a connective tissue basement membrane
Serous Membranes
Line walls of body cavities
Parietal
Covers organs found in body cavities
Visceral
Ex: Parietal and visceral layers line walls of thoracic cavity and cover the lungs
Pleura
Ex: Parietal and visceral layers line walls of abdominal cavity and cover the organs in that cavity
Peritoneum
Inflammation of the serous membranes that line the chest cavity and cover the lungs
Pleurisy
Inflammation of the serous membranes in the abdominal cavity that lines the walls and cover the abdominal organs
Peritonitis
- Line body surface that open directly to exterior
- Produce a thick secretion that keeps the membranes soft and moist
Mucous Membrane
- Produce a lubricant in connective tissue called…
- The space between joints and the lining of the bursal sacs
Synovial fluid
- Outermost and thinnest primary layer of skin
- Composed layers of stratified squamous epithelium
- Sometimes called the pigment layer
Epidermis
- Innermost (deepest) layer of cells that continually reproduce
- New cells move towards the surface
Stratum germinativum
Pigment cells, which produce the brown pigment melanin
Melanocyte
Tough, waterproof protein
Keratin
Outermost layer of keratin-filled cells
Stratum corneum
Bluish gray color indicates decreased blood oxygen level
Cyanosis
Patchy light skin areas resulting from acquired loss of epidermal melanocytes
Vitiligo
Small, flat macules, common skin pigment variation
Freckles
- Deeper and thicker of the two primary skin layers and composed largely of connective tissue
- Upper area characterized by parallel rows of peglike dermal papillae
- Thick skin has parallel friction ridges and no hair
- Thick skin has irregular, shallow grooves and hair
- Deeper area is filled with network of tough collagenous and stretchable elastic fibers
Dermis
Gluelike layer between the dermis and epidermis
Dermal-epidermal junction
Small bumps that help stabilize the junction
Dermal papillae
Caused by breakdown of union between cells or primary layers of skin
Blister