Tissues/ Histology Flashcards
Squamous Epithelium?
Flat, rapid passage of substance.
Epithelial Tissue?
Avascular, has a nerve supply.
Cuboidal Epithelium?
Square, secretion/ absorption.
Columnar Epithelium?
Taller, more protection, secretion/ absorption, may have vili or cilia.
Transitional Epithelium?
In bladder, change shape, cuboidal to flat, stretch.
Simple Squamous?
Lines heart, alveoli, blood vessels.
Exocrine Glands?
Secretes into duct. (mucus, perspiration, milk, salvia, digestive enzymes)
Endocrine Glands?
Secretes into interstitial fluid & diffuse. (pituitary, hormones, adrenals, thyroid)
Simple Columnar?
Some cuboidal, ovaries, secretory part of glands, thyroid.
Ciliated Simple Columnar Epithelium?
Trachea/ upper respiratory tract.
Matrix?
Material between cells.
Fibroblasts?
Secretes fibers, strength/ support.
Collagen Fibers?
Most common, very strong, 25% protein in body, in most connective tissue, vit. C, MSM.
Elastic Fibers?
Smaller, stretch 1 1/2 X length & return, elastin.
Reticular Fibers?
Support walls of vessel, organ framework, thin fibers, basement membrane.
Loose Connective Tissue?
Areolar, adipose, reticular connective tissue.
Areolar?
Subcutaneous, mucus membranes, around blood vessels.
Adipose?
Fat, triglyceride storage.
Reticular Connective Tissue?
Binds liver, spleen, lymph nodes.
Dense Connective Tissue?
Regular & irregular.
Dense Connective Tissue - Regular?
Tendons, ligaments, aponeurosis, attachments.
Dense Connective Tissue - Irregular?
Fascia, deep dermis, periosteum, joint/ organ capsules.
Elastic Connective Tissue?
Lung, arteries, bronchioles, vocal cords, ligament between vertebrae.
Hyaline Cartilage?
Ends of long bones, ribs, nose, larynx, trachea.
Fibrocartilage?
Pubic symphysis, IVD, menisci, (Ex. spine).
Elastic Cartilage?
Ear, epiglottis, Eustachian tubes.
Mucous?
Line cavity open to exterior.
Serous?
Line closed to cavity.
Epidermis?
Superficial, thin.
Dermis?
Deep, connective tissue.
Hypodermic?
Not part of skin, subcutaneous, areolar & adipose cells.
Keratinocytes?
Produce keratin, water repellant/ sealant, 90% of cells.
Melanocytes?
Pigment melanin, 8% cells, absorb UV light.
Langerhan’s Cells?
Immune cells, damage by UV light.
Merkel Cells?
Tactile sensation.
Epidermal layers - what is the 1st layer? (most superficial - deepest)
Stratum Corneum.
Epidermal layers - what is the 2nd layer? (most superficial - deepest)
Stratum Lucidum.
Epidermal layers - what is the 3rd layer? (most superficial - deepest)
Stratum Granulosum.
Epidermal layers - what is the 4th layer? (most superficial - deepest)
Stratum Spinosum.
Epidermal layers - what is the 5th layer? (most superficial - deepest)
Stratum Basale.
Papillae?
Finger-like projections, contains arteries, veins, & nerves, Meisner’s corpuscles & free nerve endings.
Meisner’s Corpuscles?
Touch.
Free Nerve Endings?
Warm, cool, pain, tickle, touch.
Arrector Pilli?
Smooth muscle from dermis to follicle.
Alopecia?
Hair loss - many causes.
Sebaceous Gland?
Oil, most connected to hair follicle, make sebum, protect, skin, blackhead/ pimple/ boil.
Sudoriferous Gland?
Eccrine, water, ions, urea, urea acid, ammonia, glu, lac, a.a., reg. temp., in deep dermis.
Apocrine Glands?
Sex, excitement, axilla/ groin, subcutaneous, open to hair follicles, more fat & protein than eccrine, emotional stress.
Ceruminous Glands?
Ear wax, sticky barrier to foreign matter.
