Histology Flashcards
(42 cards)
What is the epithelial lining of the epidermis?
Keratinized stratified squamous
Which embryological layer gives rise to the epidermis?
Ectoderm
What layer of the skin is composed of a dense connetive tissue that imparts mechanical support, strength, and thickness to the skin?
Dermis
Which embryological layer gives rise to the dermis?
Mesoderm
What is the layer of the skin that contains fat and is deep to the dermis?
Hypodermis/Subcutaneous fascia
What is hair, sweat glands, sebaceous glands, nails, and bewbs a derivative of?
Epiderm
What are the 5 layers of the skin?
From inner –> outer:
Basale Spinosum Granulosum Lucidum (only in thick skin) Corneum
What is the main fucntion of the stratum basale?
Epidermal cell renewal
Which epidermal layer is also called the “prickle cell” layer because of the characteristic short processes that extend from cell to cell?
Stratum spinosum
What are the connections called between the cells of the stratum spinosum?
Desmosomes
What are the keratohyalin granules composed of in the stratum granulosum?
Cystine and kistidine rich proteins that are precuresors to flaggrin (aggregates keratin filaments)
Are the cells in the stratum corneum nucleated or anucleate?
Anucleate
What is the main component in the cells of the stratum corneum, which allows it form the water barrier?
Keratine filaments
These are the fingerlike CT projections in the dermis that project into under the surface of the epidermis.
Dermal papillae
What helps the dermal papillae hold the dermis and epidermis together?
Epidermal/Rete Ridges
What forms your fingerprints?
Dermal ridges
What are the proteins that strengthen the attachement of the epidermis to the underlying connective tissue?
Hemidesmosomes
Which layer of the dermis is most superficial, contains loos CT (collagen I and III) + dermal ridges + BV + nn?
Papillary layer
What is the dermal layer that is under the pappilary layer, and cotnaisn thick irregular bundles of collagen I and elastic fibers?
Reticular layer
In the dermal reticular layer, what is it called when the collagen and elastic form lines of tension in the skin?
Langers lines
What is the layer of adipose rissue under the reticular layer in some areas, and serves as a major energy source site and provides insulation?
Panniculus adipose
Story time!
I worked with a doc that was super arrogant towards fat people. Like he always bitched up a storm about them to me and to their faces. So there’s these gradings of pannus, which is the extent to which your stomach fat hangs over your belly (we might learn about these later in this system). Grade 1 is like over ur junk, grade 3 over ur thighs, and grade 5 i think over ur knees (real big). One time we were walking into the pts room in the ICU where we had to put in a central line, and we had a real big’un. I knew it would be bad. He pulled back the curtain and yelled “OH. GOD. DAN. WRITE THIS DOWN. ON INITIAL INSPECTION THIS PATIENT CLEARLY HAS A GRADE 5 PANNUS HANGING OVER THE BEDSIDE RAILING.” I held my head down in embarrassment. The patients face: ( O_O )
What are the smooth muscels that connect to deep part of hair follicles?
Arrector pili muscles
goosebumps
What are the striated muscles deep to the subQ fat, largly vestigial in humans, but composes the platysma and other facial expression mm?
Panniculus carnosus
GRADE 5 PANNUS DAN
