BIOS251 Week 3 Lab Exercise Tissues and Integumentary System 1. Describe the characteristics of epithelial tissue. (5 points) The most basic characteristics of the epithelial tissue is that it covers the surfaces of the body whether internal or external. It acts as a protective covering or boundary for such surfaces‚ including the outer layer of the skin‚ as well as the inner surface of the hallow organs like the stomach‚ colon‚ and blood vessels. Other characteristics is that it is made
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Types of epithelial tissue Connective tissue -Connective tissues are fibrous tissues. They are comprised of cells separated by non-living material‚ which is called extracellular matrix. Connective tissue holds other tissues together such as in the formation of organs‚ and has the ability to stretch and contract passively. Bone‚ often referred to as osseous tissue‚ and blood are examples of specialized connective tissues. Conective tissues are cells that are suspended in a matrix of their own secretions
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Rosacea is a skin disease that affects the middle third of the face. It is viewable as redness on the face and nose that normally blush. It is mainly seen on the forehead‚ the chin and the lower half of the nose. Pimples can occur in Rosacea‚ in fact pimples in most case are mistaken as acne known as acne rosacea. Rosacea is different from acne. It is mostly found in adults and is most commonly found in ages 30-60 especially adults who have fair skin. The difference between acne and Rosacea is that
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ANATOMY Anatomy‚ Physiology‚ & Pathophysiology Roots‚ Prefixes‚ and Suffixes 1. a- without or absence of: (asepsis‚ avascular tissue) 2. ab- away from: (abduction) 3. acro- top or end: (acromion process) 4. ad- to or towards: (adduction‚ adductor muscle) 5. aesth – feeling: anesthesia) 6. –algia pain: (neuralgia) 7. ambi- both: (ambidexterous) 8. amubl- walk: (ambulatory) 9. an- without: (anaerobic respiration) 10. ante- before‚ in front of: (antecerebellar)
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Classification of Epithelia Lines Examples Simple squamous Surfaces involved in passive transport Alveoli Endothelium Loops of Henle Simple cuboidal epithelia Surfaces involved in secretion and absorption Some glands Ducts Collecting tubule of kidney Simple columnar epithelia Surfaces involved in high rates of secretion and absorption Protection Stomach and small intestine where it has microvilli Collecting tubule of kidney Fallopian tubes where it is ciliated Pseudostratified Usually ciliated
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Diagram and example of where found Cuboidal Epithelium The simple cuboidal epithelium secrets and reabsorbs water and small molecules‚ it can be found in the kidneys tubules. The stratified epithelium secrets water and ions. Columnar Epithelium The simple columnar absorbs nutrients and produces mucus. It can be found in digestive organs e.g. small intestine. The stratified columnar secrets mucus.it can be found in the mammary glands. Squamous Epithelium The simple squamous allows exchange of nutrients
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learn about each. In this lab I will observe each membrane. Basically just getting to know each membrane better. Exercise 1: The Microscopic Structure of Cutaneous Membranes Observations: Draw your sketch of keratinized stratified squamous epithelium here. Label the keratinized layer. Describe the structures and cells you observed. QUESTIONS: A. What is keratin? Tough fibrous protein. B. Why is your skin keratinized? To protect the skin from the outside. Exercise 2: Microscopic Structure
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here) *two slides -Cyst that arises from epithelium entrapped within lymphoid tissue. It presents as a superficial submucosal mass that is yellow or whitish in coloration. The most frequent location is in the floor of the mouth followed by the posterior lateral border of the tongue‚ soft palate‚ tonsillar pillars‚ orophorynx‚ and the ventral tongue. The entrapped epithelium may have originated from salivary gland ducts or from the lining epithelium of surface invaginations plugged with
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ESC 495 Glutaraldehyde Glutaraldehyde is an oily‚ colorless liquid chemical with a strong‚ pungent smell. It is an organic compound with the formula CH2(CH2CHO)2.Glutaraldehyde has several applications; it is used as a cold sterilant in the health care industry‚ primarily to disinfect medical equipment‚ as well as dental equipment. Glutaraldehyde is used as a biocide (meaning it can deter harmful organisms) in metalworking fluids and in oil and gas pipelines. Glutaraldehyde can
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The Effect of Mercury on Sodium Transport Across a Cane Toad (Bufo Marinus) Skin Epithelium Tchong Lioong CHEUNG KAI SUET School of Biomedical‚ Bimolecular and Chemical Sciences‚ Department of Physiology‚ The University of Western Australia‚ Crawley‚ Australia 6009. Received 23rd April 2012; revised 7th May 2012; accepted 7th July 2012 _____________________________________________________________________________ Abstract Mercuric Chloride (HgCl2) was used to investigate apical Sodium
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