Epithelial Tissue

Vocabulary flashcards for Epithelial Tissue lecture review.

Epithelial Tissue

A primary tissue type that covers body and organ surfaces, lines body cavities and organ cavities, and forms glands.

Epithelial Tissue Composition

Tightly packed cells with minimal extracellular matrix; subtypes include simple and stratified epithelium.

Epithelial Tissue Functions

Covers body and organ surfaces, lines body cavities and organ cavities, forms glands

Simple Epithelium

Simple squamous, simple cuboidal, simple columnar, pseudostratified columnar

Stratified Epithelium

Stratified squamous, stratified cuboidal, stratified columnar, transitional

Epithelial Tissue Characteristics

Adjacent to a free surface, lacks intercellular material, non-vascular, contains nerve supply, mitotic, rests upon a basement membrane.

Epithelial Tissue Functions

Protection, Secretion, Absorption, Filtration

Epithelial Tissue Shapes

Squamous, Cuboidal, Columnar, Transitional

Epithelial Tissue Number of Layers

Simple, Stratified, Pseudostratified

Simple Epithelium

One layer of cells

Stratified Epithelium

Two or more layers of cells

Simple Squamous Epithelium

Single layer of thin, flat cells; allows for rapid diffusion and filtration; found in air sacs of lungs and lining of blood vessels.

Simple Cuboidal Epithelium

Single layer of cells about as tall as they are wide; functions in absorption and secretion; found in kidney tubules and thyroid gland follicles.

Nonciliated Simple Columnar Epithelium

Single layer of nonciliated cells taller than they are wide; functions in absorption and secretion; found in the lining of most of the gastrointestinal tract.

Ciliated Simple Columnar Epithelium

Single layer of ciliated cells taller than they are wide; secretes mucus and moves oocytes; found in the lining of larger bronchioles and uterine tubes.

Ciliated Pseudostratified Columnar Epithelium

Single layer of cells with varying heights; provides protection and secretes mucus; found in the lining of larger airways of the respiratory tract.

Nonciliated Pseudostratified Columnar Epithelium

Single layer of cells with varying heights; provides protection; found in the lining of part of the male urethra and epididymis.

Keratinized Stratified Squamous Epithelium

Multiple cell layers with dead, keratin-filled apical cells; protects underlying tissue from abrasion; found in the epidermis of the skin.

Nonkeratinized Stratified Squamous Epithelium

Multiple cell layers with living apical cells; protects underlying tissue from abrasion; found in the lining of the oral cavity, esophagus, and vagina.

Stratified Cuboidal Epithelium

Two or more layers of cells about as tall as they are wide; functions in protection and secretion; found in ducts of exocrine glands and ovarian follicles.

Stratified Columnar Epithelium

Two or more layers of cells taller than they are wide; functions in protection and secretion; found in large ducts of salivary glands and the male urethra.

Transitional Epithelium

Epithelial appearance varies depending on whether tissue is relaxed or distended; accommodates urine volume changes; found in the lining of the urinary bladder, ureters, and part of the urethra.

Endocrine Glands

Glands that secrete hormones directly into the bloodstream.

Exocrine Glands

Glands that secrete products into ducts.

Simple Glands

Unbranched duct structure in multicellular exocrine glands.

Compound Glands

Branched duct structure in multicellular exocrine glands.

Merocrine Secretion

Secrete by exocytosis

Holocrine Secretion

Accumulate products; cell dies and is discharged with its contents

Apocrine Secretion

Accumulate products at tip and cell pinches off