A&P lab2 - Name: Craig Nowakowski Section: DL3...

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Name: Craig Nowakowski Section: DL3 Laboratory Report: Exercise 2: Histology Purpose: The Purpose of this exercise is to gain an understanding of histology, the study of the microscopic anatomy of cells and tissues of plants and animals, by observing different types of cells and tissue through a microscope and answer questions relating to our observations. This is important for understanding pathology and disease formation, along with the homeostatic function of the body. Safety: Always use clean workspace; handle slides and microscope with care. Activity 1: Epithelial Tissue Lab observations: TISSUE TYPE OBSERVATIONS Simple Squamous Single layered, narrow cells Simple Cuboidal Cube/roundish shaped, single layer Simple Columnar (stomach) Column shaped, single layer Stratified Squamous (keratinized) Layered; narrow cells Pseudostratified Ciliated Columnar Layered columns w/ hair like extensions. Transitional Distinct transition from one cell type to the
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next. Stratified Cuboidal (online) Layered cube like cells Stratified Columnar (online) Layered columns Questions: 1. Why is the study of histology important in your overall understanding of anatomy and physiology? Histology is the study of the microscopic anatomy of cells and tissues of plants and animals. It is an essential tool of A&P because it allows us to study diseased tissue, provides an important tool in anatomical pathology, allows for the accurate diagnosis of cancer and other diseases. 2. How are epithelial tissues named? Epithelial tissue is named based on their shape, size, and arrangement. Epithelial tissues come in three basic types: squamous, cuboidal and columnar. These three types of tissue are seen in either simple (only one cell layer thick) or stratified (many cells in thickness) arrangements. 3. Why is some epithelium stratified? Stratified epithelium consists of more than one layer of cells. It is often found in situations subject to abrasion, where the top layers of cells are worn off. Layers underneath replace the lost cells, so the basic function of stratified epithelium is protection. 4. Unlike squamous cells, cuboidal and columnar cells have large, open cytoplasms. Which of the functions of epithelial tissue are supported by having such big cells? Cuboidal epithelium is commonly found in secretive or absorptive tissue: for example
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A&P lab2 - Name: Craig Nowakowski Section: DL3...

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