Chapter 4 Histology Lab.doc - Anatomy & Physiology I, BIOL...

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Anatomy & Physiology I, BIOL 2100Name:Chapter 4 Lab HistologyDirections: Follow the lab procedures.Fill out the document, type your answers in red or a different color. Makesure your answers are clear and in full sentences.Objectives:After completing this lab, students will be able to:Identify the following tissues:Simple squamous epitheliumStratified squamous epithelium(skin, esophagus, vagina)Simple columnar epitheliumCuboidal epitheliumDense regular connective tissueAreolar connective tissueDense Irregular ConnectiveTissueHyaline cartilageElastic cartilageBoneSkeletal muscleCardiac muscleSmooth muscleDescribe the functions of the different types of epitheliumDescribe what is common among all types of connective tissueHistology is the study of microscopic anatomy, or tissues. Tissues are composed ofcells, which act as thefunctional unit of the tissue. These cells are living units that are generally capable or replicating orreproducing themselves. In addition to the living cells, tissues may also be surrounded by a non-livingground substanceor rest on abasement membrane, which may have both living cells and non-livingsubstances. There are four basic tissue types in the human body:epithelium, connective tissue, muscle,andnervous tissue.These four tissue types have many sub-types with a great variety of structural andfunctional differences.Procedure:The following pages describe the tissues in more detail. Read the descriptions and,in the spaces following each description, insert a picture from the internet.Suggestion is to use this website but other images will be accepted. At the end ofthis lab there are discussion questions make sure to fill them out as well.Part I: EpitheliumEpithelium is a tissue that covers and lines organs of the body. It covers the body, the insides of bloodvessels, and other hollow organs. It is also found in many glands and ducts in the body. Epithelium can bespecialized for protection, secretion or absorption. Epithelium is named on the basis of three things:1)Its shape: A cell that is flat or scaly looking is said to besquamous, while cells that are taller thanthey are wide are calledcolumnar. If the cell is basically the same height, width and depth, it issaid to becuboidal.1
Anatomy & Physiology I, BIOL 21002)The number of layers of cells present: If there is just one layer of cells, it is said to be simple. Ifthere are multiple layers it is said to be stratified. If the bottom layer of stratified epithelium looksdifferent from the top, the tissue will be named for the type of epithelium on the top.3)surface modifications: Often times columnar epithelium has cilia on the surface. It will then becalled ciliated epithelium.

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