Interactive classes - MK and CC Flashcards
What type of epithelium is the epidermis?
Keratinizing stratified squamous epithelium.
Are eccrine sweat glands exocrine or endocrine glands?
Exocrine glands because they have a duct.
What functions does the skin perform and which structures contribute? - UV protection
Melanocytes
What functions does the skin perform and which structures contribute? - Temperature regulation
Vascular plexus, sweat glands, hair
What functions does the skin perform and which structures contribute? - Immune surveillance
Langerhans cells, keratinocytes
What functions does the skin perform and which structures contribute? - Waterproofing
Stratum corneum, sebum
What functions does the skin perform and which structures contribute? - Psychosexual/social function
Hair, pigmentation, apocrine glands
What functions does the skin perform and which structures contribute? - Mechanical barrier
Epidermis, dermis, subcutis
What functions does the skin perform and which structures contribute? - Insulation
Subcutaneous fat
What functions does the skin perform and which structures contribute? - Calorie storage
Subcutaneous fat
What functions does the skin perform and which structures contribute? - Sensory system
Merkel cells, free nerve endings, sensory organs and fibres
What vascular and cellular processes have resulted in the accumulation of neutrophils at the site of inflammation?
Vasodilatation
Increased vascular permeability and oedema
Emigration of neutrophils and macrophages
How does granulation tissue form?
Angiogenesis (vascular proliferation)
Fibroblast proliferation, controlled by macrophages
Which cells are responsible for production of collagen in the healing wound?
Fibroblasts produce collagen, controlled by macrophages
How does the scar differ from the adjacent dermis?
More cellular (fibroblasts)
Thin collagen
No pilosebaceous units or eccrine sweat glands
How does the overlying epidermis differ from the adjacent epidermis?
Hyperplastic epidermis = pseudoepitheliomatous hyperplasia
This will resolve over time
Describe the shapes of the 3 types of epithelial cells
- Squamous = thin and flat
- Columnar = almost oblong shaped
- Cuboidal = all sides equal
What is the Most common type of epithelium?
Stratified Squamous Epithelium
Describe the Stratified Squamous Epithelium
Stratified = cells pile on top of each other
Stratification is necessary at sites of friction with the risk of mechanical damage
Squamous = cells are flat
Squamous epithelium in internal organs appears white on naked eye examination
Stratified Squamous Epithelium could be…
keratinised or non-keratinised
What is keratin?
Keratin is the protein present in skin cells produced by keratinocytes
Keratin makes the skin impervious
What is the most superficial part of the skin?
consists of dead keratinised cells which makes the skin waterproof
The oesophagus is joined to the stomach at the…
oesophago-gastric junction (OGJ)
What does oesophagus and stomach mucosa look like?
White and Pink