4.1+4.2 Structure and Human fucntion

Define Tissues

Group of similar cells organized to work together to form a specific function

Four primary tissues types

Epithelial tissue, Connective tissue, Muscle tissue, Nervous tissue

Steps involved in preparing tissue for microscopic viewing

Fixed, Sectioned, Stained

Epithelial tissue and where to find

Forms boundaries between different environments, protects, secretes, absorbs, filters, lines hollow organs, glands, skin surface

Muscle tissue and where to find

Contracts so movement can happen, bones, heart, walls of hollow organs

Nervous tissue and where to find

Communication, brain, spinal cord, nerves

Connective tissue and where to find

Supports and proects tissues and binds them together, bones, tendons

Apical surface

border that faces outside of body or cavity of an internal organ

Microvilli

On the apical surface, extends plasma membrane and increases exposed surface area

Cilia

On the apical surface, propels substances along apical surface

Basal surface

Attached to underlying connective tissue, noncellular thin layer of supporting sheet made of glycoprotiens

Simple epithelia

Single cell layer, found where absorption, secretion, and filtration happen

Stratified epithelia

Made of two or more cell layers stacked on top of each other, found in high-abrasion areas where protection needed

Squamous cells

Flattened and scale like

Cuboidal Cells

Cube shaped, as tall as they are wide

Columnar Cells

Tall and column shaped