Microscopy and Histology Vocabulary Flashcards

Vocabulary practice flashcards covering microscopy principles, calculation formulas, tissue classification, cell shapes, layer arrangements, and specific types of epithelial tissue.

Total Magnification Formula

The total magnification of a compound microscope, calculated as $\text{Eyepiece/Ocular Magnification} \times \text{Objective Magnification} = \text{Total Magnification}$.

Apical Surface

The exposed surface of epithelial tissue that faces an open space or body exterior.

Basal Surface

The attached deep surface of epithelial tissue that connects to the underlying basement membrane.

Epithelial Tissue

A primary tissue type mostly composed of cells that covers and protects surfaces both inside and outside the body; characterized as avascular with high powers of regeneration.

Connective Tissue

A primary tissue type that encloses and separates other tissues, connects tissues to one another, supports and moves body parts, stores compounds, cushions, insulates, transports, and protects.

Squamous Cell

Epithelial cells that are flat or scale-like in shape.

Cuboidal Cell

Epithelial cells that are cube-shaped and roughly as tall as they are wide.

Columnar Cell

Epithelial cells that are column-shaped and taller than they are wide.

Simple Epithelium

An arrangement composed of a single layer of cells, where every cell extends from the basement membrane to the free surface.

Stratified Epithelium

An arrangement containing more than one layer of cells, in which only the deepest basal layer attaches to the basement membrane.

Pseudostratified Epithelium

A single-layer epithelial arrangement that appears to be multiple layers because cell nuclei are located at different levels.

Transitional Epithelium Arrangement

A specialized arrangement of stratified cells that changes shape from cuboidal/columnar to flattened squamous-like cells when stretched.

Simple Squamous Epithelium

Structure: Single layer of flat, hexagonal cells. Function: Diffusion, filtration, protection against friction, and secretion. Location: Blood vessels, heart, alveoli of the lungs, and body cavities.

Simple Cuboidal Epithelium

Structure: Single layer of cube-shaped cells (some with microvilli or cilia). Function: Secretion, absorption, and movement of particles in mucus. Location: Glands and their ducts, plexuses of the brain, and ovaries.

Simple Columnar Epithelium

Structure: Single layer of tall, narrow cells. Function: Secretion in glands, stomach, and intestines; absorption in intestines; movement of particles out of bronchioles and movement of oocytes. Location: Auditory tubes, gallbladder, and ventricles of the brain.

Pseudostratified Columnar Epithelium

Structure: Single layer of tall, thin ciliated cells with varying heights and nuclei at different levels. Function: Secretion and movement of mucus. Location: Auditory tubes and the respiratory system.

Stratified Squamous Epithelium

Structure: Multiple layers of cuboidal cells that progressively flatten towards the free surface; exists as keratinized or nonkeratinized. Function: Protects against abrasion, forms a barrier against infection, and reduces water loss. Location: Outer layer of skin, mouth, throat, vagina, anus, and cornea.

Stratified Cuboidal Epithelium

Structure: Multiple layers of cube-shaped cells. Function: Secretion, absorption, and protection against infection. Location: Sweat glands and their ducts, ovarian follicular cells, and salivary glands.

Stratified Columnar Epithelium

Structure: Multiple layers of tall, thin cells. Function: Secretion and protection. Location: Mammary gland ducts and male urethra.

Transitional Epithelium

Structure: Stratified cells that appear cuboidal when not stretched and squamous when stretched by fluid. Function: Accommodates fluctuations in fluid volume and protects against caustic urine. Location: Uterus and urinary tract.