Epithelial Tissue

Simple Epithelium

Simple Squamous Epithelium

Found lining internal and external surfaces (i.e. blood vessels, lymphatic vessels, lung alveoli, peritoneal, pleural, and pericardial cavities

Kidney | loop of Henle, Bowman’s Capsule

Simple Cuboidal Epithelium

Found lining surface if ovary, lens, ducts of glands (i.e. sebaceous glands)

Kidney | collection tubules in kidney

Simple Columnar Epithelium

Ciliated | found lining digestive system, small bronchi, uterus, oviducts, testis

Non-Ciliated | found lining gall bladder, ducts of large glands (i.e. salivary glands),

Kidney | papillary Ducts (Ducts of Bellini)

Simple Squamous Epithelium

Alveoli

Simple Cuboidal Epithelium

Kidney

Simple Cuboidal Epithelium

Kidney

Simple Columnar Epithelium

Kidney

Simple Columnar Epithelium

Kidney

Simple Columnar Epithelium 

Small Intestine (Ileum)

Pseudostratified Epithelium

Pseudostratified columnar epithelium

Ciliated – found lining trachea, bronchi, auditory tube, tympanic cavity, nasal cavity

Non-Ciliated – found lining epididymis

Pseudostratified Columnar Epithelium with Cilia

Trachea

Pseudostratified Columnar Epithelium

Trachea

Stratified Epithelium

Stratified Squamous Epithelium

Keratinized | found lining skin

Layers of the Skin | stratum germinativum, stratum spinosum, granular stratum granulosum, hyaline stratum lucidum, cornified stratum granulosum

Non-keratinized | found lining mouth, oral pharynx, esophagus, vocal chords, vagina

Stratified Cuboidal Epithelium

Found lining ducts of sweat glands, testis

Stratified Columnar Epithelium

Uncommon, found lining conjunctiva of eye, large excretory ducts (i.e. bile ducts), male urethra

Transitional Epithelium

Found lining the urinary bladder, Key ID – dome shaped/binucleated cells

Keratinized Stratified Squamous Epithelium

Skin

Keratinized Stratified Squamous Epithelium

Skin

Keratinized Squamous Epithelium

Skin

Keratinized Squamous Epithelium

Skin

Non-Keratinized Squamous Epithelium

Esophagus

Transitional Epithelium

Urinary Bladder

Glands

Exocrine Glands

Unicellular Glands

Goblet Cell | found lining digestive and respiratory track, secretes mucous

Multicellular Glands

Simple Tubular (Branched) Gland | gastric glands found in stomach containing three types of secretory cells – epithelial mucous cells, parietal cells (HCl), chief cells (pepsin)

Simple Tubular Gland | found in large intestine

Compound Acinar (Branched) Gland | exocrine pancreatic gland

Compound Tubuloacinar (Branched) Gland | salivary gland

Goblet Cells

Small Intestine

Goblet Cells

Small Intestine

Simple Tubular (Branched) Glands

Stomach

Simple Tubular Gland

Large Intestine 

Acinar Cells

Pancreas

Sebaceous Glands

Scalp

Sebaceous glands are holocrine glands where the entire is being secreted during discharge.

Sebaceous Glands

Scalp

Endocrine Glands

Ductless glands composed of clumps or chords of secretory cells secreting hormones into bloodstream

Islets of Langerhans | alpha (glucagon) and beta (insulin) cells

 

Islets of Langerhans

Pancreas