Tissues are groups of cells with a common structure (form) and function (job) there are four main tissues in the body - epithelium, muscle, connective tissue and nervous tissue i epithelium. Epithelial tissue epithelial tissue is a sheet of cells that covers a body surface or lines a body cavity two forms occur in the human body: covering and lining epithelium- forms the outer layer of the skin lines open cavities of the digestive and respiratory systems covers the walls of organs of the closed ventral body cavity. Simple columnar epithelium, duodenum, x400 the little purple dots are goblet cells at 10x magnification, search for an area of the slide that has finger-like projections surrounding a lumen - these are the villi.
The outer epidermis (stained purple) is the stratified squamous epithelium in the high magnification image, note that the outermost layer of the epidermis, the stratum corneum , consists of dead, highly keratinized cells. Simple epithelial tissues are generally classified by the shape of their cells the four major classes of simple epithelium are: 1) simple squamous 2) simple cuboidal 3) simple columnar and 4) pseudostratified simple squamous simple squamous epithelium cells are flat in shape and arranged in a single layer. Fully keratinized cells are observed as multiple layers of pink to purple fibrous material sloughing off of the surface of the epithelium b) non-keratinized the eyelid contains both keratinized and non-keratinized stratified squamous epithelia. Found in most of the digestive tract, like the stomach found in the trachea (just remember cilia pushes mucus up, in the trachea) nonkeratinized forms in all places mucous membranes are found saliva, sweat and mammary glands all have these cuboidal stratified tissue very rare, found in male urethra and large ducts of some glands.
There are different types of cells in the epithelium such as parietal cell, stem cell, mucous neck cell, chief cell and enteroendocrine cell the lamina propria : lamina propria of stomach is composed of loose connective tissue interspersed with smooth muscle and lymphoid cells. Tissue anatomy histology this lab focused on the examination and identification of tissues that make up the organs of the body the tissues are divided into four main categories: epithelial, connective, muscle, and neuronal. The inner wall of the esophagus is lined with stratified squamous epithelium it shows up as large purple on your slide notice that the cells at the base of this epithelial layer are cuboidal. Cuboidal epithelial cells, as their name suggest, are shaped like cubes these are typically found in tissues that secrete or absorb substances, such as in the kidneys and glands these are typically found in tissues that secrete or absorb substances, such as in the kidneys and glands.
Simple cuboidal epithelium (400x)--thick section kidney medulla this image is an enlargement of the one just above it the color of the stain is different from the top three images, but you can still recognize the pattern formed by the nuclei of the simple cuboidal epithelial cells--just look for the circles. The shape and arrangement of epithelial cells typically determines the name for each epithelial tissue there are also some types of epithelial tissue with more unique features named according to their specialization. Tissue types study guide by happybunny67 includes 64 questions covering vocabulary, terms and more quizlet flashcards, activities and games help you improve your grades.
Classified based on the number of cell layers and cell shape (1st name of tissue indicates number of cell layers, 2nd name of tissue describes shape of cells) simple epithelia has one layer of cells. Name one difference between the growth of cartilage tissue compared to bone cartilage cells can divide and so expand the matrix from within (interstitial growth)and by cell division at the surface (appositional growth), whereas bone tissue can only grow by appositional growth since its matrix is calcified. 1) simple columnar a diagram (cells are the layer of pink, elongated cells, the purple cells within them are goblet cells) b name 2 areas where it is located in the body. These cells appear as clear or slightly basophilic (blue or purple staining) spaces in the epithelium, since their secretory product is not well preserved by routine fixation and dehydration nor well stained by h&e.
The term epithelium refers to layers of cells that line hollow organs and glands it is also those cells that make up the outer surface of the body. Epithelial tissues line the outer surfaces of organs and blood vessels throughout the body, as well as the inner surfaces of cavities in many internal organs an example is the epidermis, the outermost layer of the skin there are three principal shapes of epithelial cell: squamous, columnar, and cuboidal.
Prepared staining kits for histology and pathology f connective tissue stains f1 van gieson stains and related van gieson's method for collagen fibers. Epithelium consists of closely packed, flattened cells that make up the inside or outside lining of body areas there is little intercellular material the tissue is avascular, meaning without blood vessels. Pavement epithelium is a simple squamous epithelium consisting of flattened cells this type of epithelium, for example, occurs on the mesentery (mesothelium) and lining blood vessels (endothelium) this specimen is a whole mount of thin mesentery stained with silver to outline individual cells and hematoxylin to show the nuclei.