epithelial

squamous

Scale-like in texture

• columnarShaped like a pillar
• ciliatedHaving tiny beating hairs
• microvilliMicroscopic membrane protrusions

polarity · adhesion · apical · basal · lateral · absorptive · secretory · keratinized · stratified · simple

mucosa

Moist organ lining

• mucousSlime-producing, bodily
• serosaFluid-secreting tissue layer
• peritoneumMembrane lining the abdomen

pleura · pericardium · membrane · barrier · interface · cavity · lumen · secretion · absorption · glandular

epidermis

Outermost tissue layer

• keratinStructural hair protein
• melanocyteCell that produces melanin
• dermisLiving tissue under epidermis

melanin · sebum · pores · collagen · complexion · pigmentation · dermatology · acne · eczema · psoriasis

barrier

Obstruction preventing passage

• permeabilityAbility to transmit fluids
• immunityProtected from harm
• defenseProtection against harm

waterproof · infection · pathogen · antimicrobial · mucus · shield · selective · impermeable · homeostasis · containment

• tissuesadipose, neural tissue, cardiac tissue, fibrous tissue, bone
• forensicsDNA, DNA analysis, fingerprints, forensics, criminalistics
• wound healingscab, scar, granulation, wound closure, scar formation
• tissue traitsconnective, elastic, fibrous, muscular, nervous
• glandssalivary gland, adrenal glands, sweat gland, adrenal gland, sebaceous gland
• developmental biologymorphogenesis, embryogenesis, gastrulation, organogenesis, ectoderm