Warm-Up What is a tissue? The study of tissues is called ______. What are the 4 main types of tissues? (See the intro to Chapter 4 in textbook)

Warm-Up What type of epithelial cell is shown below? 1. 2. 3. 4.

Tissue: The Living Fabric Chapter 4 Tissue: The Living Fabric

________: group of cells that are similar in structure and function _____________: study of tissues Types of Tissues: ______________(covering) ______________(support) ______________(movement) ______________(control)

Epithelial Tissue “epithe” = laid on, covering Structure: - Function:

Special Properties Polarity _______________= exposed free surface or edge (some with microvilli, cilia) _______________= lower, attached surface Specialized contacts Fits close together to form continuous sheets

Special Properties Supported by connective tissue Rests on __________________________ No blood supply (__________________) Rely on diffusion and underlying connective tissue for food/O2 Regeneration – Replace lost cells

Classification Two names = (# cell layers) + (shape of cells) _______________: simple or stratified ___________: squamous, cuboidal, or columnar

Simple Epithelium

Simple Epithelium Simple squamous - Capillary walls, air sacs in lungs, kidney filtration Serous membranes: slick layer lining ventral body cavity and its organs

Simple Epithelium Simple cuboidal - Lines ducts of glands (salivary), kidney tubules, ovary surface

Simple Epithelium Simple columnar - Lines digestive tract Microvilli, cilia Mucous membranes: lubricating mucus

Simple Epithelium Pseudostratified columnar Rests on basement membrane – false impression (pseudo) of being multi-layered Secretes or absorbs Respiratory tract – cilia propels mucus from lungs

Stratified Epithelium

Stratified Epithelium Stratified squamous - Esophagus, mouth, outer portion of skin

Stratified Epithelium Stratified cuboidal - Mainly in ducts of large glands (sweat, mammary, salivary) Sweat Gland Esophageal Gland

Stratified Epithelium Stratified columnar - Pharynx, male urethra, lining ducts

Transitional Epithelium Able to change shape (cuboidal  squamous) Lining of hollow urinary organs (bladder, ureter, urethra) -

Glandular Epithelium Gland: make and secrete a particular product 2 Types: _________________: produce hormones secreted into tissue fluid or bloodstream Exocrine gland: secrete products into ducts  onto body surfaces or body cavities -

Exocrine Glands Unicellular Multicellular - -