Where is this tissue found? Many of the free cells in these medullary sinuses cannot be identified; however, the large rounded cells, with eccentrically placed, vesicular nuclei are the ones you should try to find. Access to the supplemental resources for this session is password-protected and restricted to University of Michigan students. If we arrange any cell shape in a single layer, we would call it simple epithelial tissue. C is a specialized diffusion barrier. A cartilage B macrophages C an extracellular matrix D membranes 29 Connective tissue fibers are produced by A macrophages. The simplest classification of these tissues is based on the number of cell layers.
Note also that thebasement membrane underlying this particular epithelium is especially prominent. Brown fat cells would have several small lipid droplets all of which would be roughly the same size. Smooth muscle is found mainly in: the heart the stomach the brain the skeletal system 7. Chondrocytes are cells found in: the small intestine the heart the brain cartilage 8. B absence of any basement membrane.
Epithelial Tissue Epithelial Tissue Quiz This quiz consists of a series of images and questions. A specialized tissue B organ C cells D organ system 9 Epithelial tissue is characterized by A tightly packed cells. Which of these epithelia can stretch to increase the volume of the organ based on internal water pressure? Stratified Epithelium Stratified epithelia consist of more than one layer of cells and only one layer is in direct contact with the basement membrane. A 'Hint' is available before answering the question. Then use your text and atlas to review the diagnostic features of each connective tissue cell present in the micrograph.
However, as the bladder fills up, the urine in the bladder stretches the bladder walls, which stretch out the cuboidal cells and cause them to become flat, or squamous in shape, instead. The apical and basal surfaces are aligned. Name this specific tissue type. The basement membrane also helps to allow certain substances to pass through, or blocks them from doing so, in order to keep the epithelium alive. The Golgi complex in these particular plasma cells is usually in the form of a fine crescent adjacent to the nucleus and it takes some practice to recognize.
In humans, brown fat is widely distributed throughout the body in the first decade of life, but it then disappears except for regions around the kidney, suprarenal glands, aorta, neck and mediastinum. In addition to some fibroblasts and a few delicate collagen fibers, you should see quite a few plasma cells amongst the epithelial tubes is also a very good specimen to examine the pseudostratified, ciliated columnar epithelium of the trachea. Neutrophils generally enter tissues in large numbers only in response to a disease stimulus. On slide 27 look at the accumulations of darkly stained cells lymphocytes in a lymph node. Name the structure at the pointer. Tissues are groups of similar cells working together to: increase the size and mass of structures in the body perform common functions fight against diseases deliver messages 4. The degranulation of these cells is responsible for triggering type I, immediate hypersensitivity reactions.
They are exclusively found in the. For example, your body's skin would basically slide right off of you like a glove off your hand. Name the specific tissue at the pointer. Transitional epithelia are found lining the urinary bladder as well as the ureters and urethra. Name this specific tissue type.
In order to accomplish this function, however, epithelial tissues need to be tightly attached to each other, forming a mostly impenetrable layer. In white or unilocular adipose tissue, lipids are stored as a single, non-membrane bound droplet in these cells. Be sure you can identify a macrophage and not just a bunch of cells superimposed upon one another. Name two types of fibers found in this tissue. One of these exceptions is known as pseudostratified columnar epithelium, which is a type of tissue that has a single layer of cells arranged in a fashion that appears stratified. Look for adipose tissue in Slide 30 which is taken from abdominal mesentery the connective tissue that suspends the viscera within the abdominal cavity. Which type of tissue is designed to stretch? Name the cells indicated and the epithelium.
B connective, epithelial, skin and blood. This type of tissue is composed of scattered cells that form a matrix: macrophages cuboidal nervous connective 5. Transitional epithelium is found on a Stomach b Lungs c Liver d Urinary bladder 3. Simple cuboidal epithelia line the lumen of collecting ducts in the kidney and are present in the thyroid around the follicles that secrete thyroid hormones. Epithelium of bronchi is a Simple cuboidal b Glandular c Simple squamous d Pseudo stratified ciliated columar 7. Many of the major types of cellular organelles are visible in this image. A blood B muscle C cartilage D areolar tissue 43 Tendons and ligaments contain the protein A keratin.
The granules are often so dark that they obscure the nucleus. Brown fat is important for thermoregulation in newborns and hibernating mammals. The very small cracks between the fibers are just artifacts of shrinkage that occured during tissue preparation. Masson Trichrome and silver staining are frequently used in pathology to determine if connective tissue has proliferated--a sign of damage and attempted repair--in the liver, kidney and lung. They protect the underlying structures and have a secretory function such as in the thyroid or absorptive function as in the collecting ducts of the kidney. Epithelial tissue has differently shaped bricks - or cells, that is. A squamous B fibrous C stratified D simple 13 Which of the following cell organelles would be most important in secretory epithelial cells? All the cells in a pseudostratified epithelium interact with the basement membrane.
Functions of Epithelial Tissue Epithelial tissue has a number of functions, which include protection against abrasion, radiation damage, chemical stress and invasion by pathogens. Small numbers of these cells are found in the urine, as part of the normal sloughing of dead cells. Note the alternating layers of fibroblasts and collagenous fiber bundles. Stratified cuboidal epithelia are found surrounding the ducts of many glands, including mammary glands in the breast and salivary glands in the mouth. Locate the large clear circles in the connective tissue that sits beneath the epithelium. Psuedostratified tissue has a distinctive appearance because: the nuclei of individual cells do not line up perfectly cilia is attached to the surface of the cells cells are square and formed in perfect blocks cells are square in the bottom layer and flat at the top 10. You should note that the cytoplasm is quite basophilic i.