Chp 4

Epithelial Tissue

A type of tissue that covers body surfaces, lines cavities and organs, and forms glands.

Epithelial Tissue Classification by Shape

Classified into squamous (flat), cuboidal (cube-shaped), and columnar (tall).

Simple Epithelium

Epithelial tissue consisting of a single layer of cells, functions primarily in diffusion, secretion, and absorption.

Stratified Epithelium

Multiple layers of epithelial cells, primarily providing protection and abrasion resistance.

Pseudostratified Epithelium

A single layer of cells that appear stratified due to varying cell height, all touching the basement membrane.

Transitional Epithelium

Specialized stratified epithelium that can stretch, found in the urinary bladder.

Fibroblasts

Cells in connective tissue that produce fibers and are the most common type.

Collagen Fibers

Thick, strong, and flexible fibers that provide tensile strength in connective tissue.

Elastic Fibers

Fibers that contain elastin and allow stretching and recoil in connective tissue.

Ground Substance

Gel-like material that fills the space between cells and fibers in connective tissue.

Loose Connective Tissue

A subtype of connective tissue that includes areolar, adipose, and reticular tissues.

Dense Connective Tissue

A subtype of connective tissue that includes regular (tendons, ligaments) and irregular (dermis) connective tissues.

Muscle Tissue

Tissue responsible for movement, subdivided into skeletal, cardiac, and smooth muscle.

Neurons

Excitable cells in nervous tissue that transmit electrical and chemical signals.

Neuroglia

Supportive cells in nervous tissue that protect and insulate neurons.