) Introduction: The cell is the basic unit of life, and all living things are made of cells. Cells have many distinctive features, difference in shape, size and internal composition demonstrate their specific functions. All cells carry out specific functions to support life.
The purpose of this lab experiment is to be able to examine and identify by observing the different sizes, shapes, and internal composition reflected under the microscope. Hypothesis:If we observe and take note of the different types of tissues and cells under a light microscope, we should be able to identify the type of of cell, tissue, and its location.4.) Lab Procedure: Material: Microscope 16 prepared slides Lab manual Stop watch B) Methods: Used a microscope to examine the prepared 16 slides related to cells and tissues in our lab manual. Given a time frame of only 2 minutes at each microscope station we had to observe and identify each slide to distinguish the type of tissue and cell it is and it’s location.5.) With a microscope we observed the similarities and differences in the 16 prepared slides given from the instructor of the types of tissue and cells.
By observing the structural similarities found in the cells and tissues we identified the following: Epithelia: simple squamous, simple cuboidal, simple columnar, pseudo-stratified columnar, stratified squamous, stratified cuboidal and columnar, transitional, and specialized epithelia (goblet cells).Connective Tissue: Cartilage, hyaline cartilage, fibrocartilage Muscle: Smooth muscle, Cardiac muscle, skeletal muscleNervous System: satellite cells, Schwann cells, ependymal cellWe were timed at each microscope station, the limit of time may have hindered us from accuracy due to not enough time for better observations.6.) According to the data acquired from the lab, I can interpret the experimental findings that cells have many different sizes and shapes. Our hypothesis was correct, we were able to identify the type of of cell, tissue, and its location. We were able to identify the majority of the structural similarities found in many cells and tissues. Cells and tissues are very diverse, their differences reflect their specific functions.
These functions and distinctive structures patterns is what allows them to perform these specific body functions the tissue are organized into organs.7.) The study of cell types and their location, based on the results from this experiment one can suggest future scientific directions. Based on the cell and tissue type findings one can suggest specific staining procedures to be best suited to study cells and tissues. Based on the morphological characteristics, magnification power best for studying such types.
Based on the location of cells and tissues findings one can suggest cell and tissue extraction procedure modification in reference to the microscopic findings so that morphology can be maintained.8.) Answers to the questions included at the end of each manual: Differences between Epithelial and connective tissue: The function for the Epithelial tissue is the lining (skin) for the outer and inner surface of organs. Acts as a boundary that is permeable and impermeable for material that leaves and enters the surfaces. The function for the Connective tissue is to protect and support different organs and tissues. As for arrangement difference, the arrangement for the cells in epithelial tissue are in single or layers. In connective tissue, the cell arrangement is not proper, mostly spread in the intercellular matrix.2) The differences between epithelial according to their cell layers and shape.
Simple Cuboidal: Simple refers to its only one thick cell layer (monolayer) and cuboidal refers to the cube like structure. Simple columnar: Simple refers to its only one thick cell layer (monolayer) and columnarrefers to tall columns like structure. Pseudo-stratified columnar: Is actually a simple epithelium not stratified because it is onlyone thick cell layer (monolayer). But appears stratified, because nuclei are placed atdifferent levels. Cells extending from the apical and the rascal surface, so when viewedunder a microscope the tissue appears to be A multiple layers thick.Transitional cells: Is a form of stratified epithelium. But, different from other stratified epithelium due ti its stretch abilities. Appear to have a more squamous structure round when the organ is not stretched, but becomes thin and flat when the organ is stretched.
Under the microscope we saw the un-stretched form of the cell.3) The differences under the microscope among the three muscle cell types Skeletal muscles: These muscle cells have long fibers (running vertically) and appear as cross-striated elongated fibers. Each cell has multiple nuclei when observed under a microscope.
these are well organized in strips with less branching as compared to cardiac muscle cell types. Looks organized in strips with minimum branching as opposed to the cardiac muscle cell types.Smooth muscles: These muscle cells look short in size and non-striated fibers under the microscope, and have only a single nucleus per cell.Cardiac muscles: Compared to the other muscle cells these muscle cells appear to have less organized fibers and appear as striated, but branched under the microscope.