Introduction to Histology Introduction Histology is the microscopic study of cells and tissues of organisms. This study is important in the overall understanding of anatomy and physiology of organisms. It helps to understand the structures and functions of various tissues that make up bodily organs and systems (Wendy Wright‚ 2014). The cell theory states that a cell is the fundamental biological unit. All living organisms are composed of one or more cells‚ and every bodily activity that takes
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HISTOLOGY: EPITHELIAL TISSUE o Human body composed of 4 basic types of tissue: epithelial‚ connective‚ nervous and muscular o Formed by cells and molecules of the extracellular matrix o Connective tissue: characterized by the abundance of extracellular fluid o Organs can be divided by parenchyma (composed of cells for main function of organ) and stroma ( supporting tissue) o Except in brain and spinal cord stroma made of connective tissue o Epithelial tissue: covering‚ lining protecting surfaces
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sufficient NaOH has been added to react with all of the acid‚ the titration is complete -- the equivalence point has been reached. Most acid-base solutions are colorless and determining when one reactant has been totally consumed is difficult by simple observations. To allow us to visually determine this point‚ we use compounds called acid-base indicators to tell us when a reaction is complete. Dyes (usually weak organic acids) whose colors depend upon pH are often used to signal the completion of acidbase
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Chapter 4 Study Guide Bio 169 • Individual body cells are specialized -Each type performs specific functions that help maintain homeostasis • Tissues are groups of cells that are similar in structure and perform a common function • Histology – study of tissues PRIMARY TISSUE TYPES: 1) Epithelial Tissue (or epithelium) is a sheet of cells that covers a body surface or lines a body cavity Forms boundaries Occurs in the body as covering and lining epithelium and glandular epithelium
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Histo Review 1. nCAM - to block migration of neurons (it’s an antibody) 2. KNOW RBC’S EVERY STAGE‚ BRS p. 137 3. know zona glomerulosa‚ fasiculaa etc. secretions 4. in the anterior pituitary‚ know acidophils vs. basophils 5. if a drug is applied after S phase…. Stops G2 6. dynein arms have ciliary movement 7. kinesin- for fast axonal transport 8. apocrine sweat gland duct is what cell type? Simple cuboidal? 9. medial meniscus needs synovial fluid from neighboring synovial joint 10. know
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Epithelial tissue protects your body from moisture loss‚ bacteria‚ and internal injury. There are two kinds of epithelial tissues: Covering and lining epithelium covers or lines almost all of your internal and external body surfaces; for example‚ the outermost layer of your skin and other organs‚ and the internal surface lining of your lymph vessels and digestive tract. Glandular epithelium secretes hormones or other products such as stomach acid‚ sweat‚ saliva‚ and milk. Connective tissue generally
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DSD 251 Oral Biology and Histology 2 DENTAL PULP: (Origin-Functions and Anatomy-Histology Vascularity and Lymphatic supply –Nerve supply. Regressive changes of the pulp: fibrous changes pulpal stones –diffuse calcifications) DEFINITION : The pulp is a delicate mesenchymal connective tissue that occupies the pulp cavity in the central part of tooth. The normal pulp is pink‚ coherent soft tissue is noted‚ dependent on its normal hard dentin for protection. Dentin and pulp are embryologically‚ histologically
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Histology Review Supplement The slides in this section are designed to provide a basic histology review related to topics introduced in the PhysioEx lab simulations and in your anatomy and physiology textbook. From the PhysioEx main menu‚ select Histology Tutorial. The opening screen should appear after a few seconds. The Sort by menu is located at the top left. Click on the white drop-down menu and select “Histology Review” from the list. You will note that the slides in the histology module are
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Date______________ Period____ Tissues Lab Directions: This lab is broken down into three sections: Epithelial Tissue‚ Connective Tissue‚ and Muscle & Nerve Tissue. For each section‚ read the background and answer any questions before you come to class‚ then in class sketch the specimens listed under each sketch circle. For your sketches‚ include the total magnification under which you viewed the specimen and be very detailed in your sketch. Epithelial Tissue Background Functions of Epithelium
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__dantae____________________________________________ Histology Webquest 55 points 1. Go to : http://training.seer.cancer.gov/anatomy/cells_tissues_membranes/tissues/ a. Answer the following questions: (6 points) i. What fills the spaces between cells? A nonliving material‚ called the intercellular matrix‚ fills the spaces between the cells ii. What can be found in this material? The intercellular matrix may contain special substances such as salts and fibers that are unique to a specific tissue and gives that tissue distinctive
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