Biological sciences9

50 %
50 %
Information about Biological sciences9
Education

Published on February 28, 2014

Author: vannessangel24

Source: slideshare.net

BIOLOGICAL SCIENCES By: MARIA KRISIA FAE DELOS REYES DE ASIS, BSN-RN

INTEGUMENTARY SYSTEM -Made up of skin and its accessory structures (hair, nails, glands, muscles, nerves) -Protects the body, helps maintain a constant body temperature, and provides sensory information about the surrounding environment -Easily inspected and exposed to infection, disease, and injury -Can also reflect emotions (frowning, blushing) and normal physiology (sweating)

INTEGUMENTARY SYSTEM + DERMATOLOGY – medical specialty that deals with the diagnosis and treatment of integumentary system disorders SKIN -Or CUTANEOUS MEMBRANE -Largest organ of the body in area and weight - Area = 22 square feet - Weight = 4.5-5 kg

INTEGUMENTARY SYSTEM -Thinnest = eyelids - Thickest = heel - 2 main parts: EPIDERMIS – epithelial tissue DERMIS – connective tissue + SUBCUTANEOUS LAYER -Or HYPODERMIS - consists of areolar and adipose tissue - serve as a storage for fat and contains blood vessels

INTEGUMENTARY SYSTEM -Contains nerve endings called lamellated (Pacinian) corpuscles that are sensitive to pressure. EPIDERMIS -Composed of keratinized stratified squamous epithelium -Four types of cells: KERATINOCYTES, MELANOCYTES, LANGERHANS CELLS, and MERKEL CELLS.

INTEGUMENTARY SYSTEM KERATINOCYTES -90% of epidermal cells -Arranged in four or five layers and produce the protein keratin -Produce lamellar granules, which release a water-repellant sealant that decreases water entry and loss and inhibits the entry of foreign materials

INTEGUMENTARY SYSTEM MELANOCYTES -8% of epidermal cells -Produce the pigment melanin -Long and slender projections extend between the keratinocytes and transfer melanin granules to them + MELANIN – a yellow-red or brownblack pigment that contributes to skin color and absorbs damaging UV light

INTEGUMENTARY SYSTEM LANGERHANS CELLS -Arise from red bone marrow and migrate to the epidermis, where they constitute a small fraction of the epidermal cells -The participate in immune responses mounted against microbes that invade the skin

INTEGUMENTARY SYSTEM MERKEL CELLS -Least numerous of the epidermal cells -Located in the deepest layer of the epidermis, where they contact a structure called a tactile or Merkel disc which detect touch sensations

INTEGUMENTARY SYSTEM DERMIS -Deeper part of the skin -Composed mainly of connective tissue -Blood vessels, nerves, glands, and hair follicles are embedded in it -2 regions: PAPILLARY – superficial portion of the dermis (1/5) which consists of areolar connective tissue with elastic fibers

INTEGUMENTARY SYSTEM PAPILLARY – also consists dermal papillae that contain capillaries, nerves of touch, and free nerve endings RETICULAR – deeper portion of the dermis (4/5) which consists of dense irregular connective tissue with bundles of collagen and some coarse elastic fibers. Spaces b/n fibers contain adipose cells, hair follicles, nerves, sebaceous glands.

INTEGUMENTARY SYSTEM Skin color: 3 pigments: 1. Melanin 2. Hemoglobin 3. Carotene + Albinism – inherited inability to produce melanin + Vitiligo – partial loss of melanocytes from patches of skin producing white irregular spots

INTEGUMENTARY SYSTEM Skin color: CYANOTIC – bluish; decreased oxygen in tissues JAUNDICE – yellow; buildup of bilirubin in the skin (liver disease) ERYTHEMA - redness; engorgement of capillaries in the skin PALLOR – paleness; shock, anemia

INTEGUMENTARY SYSTEM + TATTOOING -Permanent coloration of the skin in which a foreign pigment is deposited with a needle into the dermis + ACNE - Inflammation of sebaceous glands that usually begins at puberty, when the sebaceous glands grow in size and increase in production of sebum

INTEGUMENTARY SYSTEM FUNCTIONS OF THE SKIN: 1. Thermoregulation 2. Blood reservoir 3. Protection 4. Cutaneous sensations 5. Excretion and Absorption 6. Synthesis of Vitamin D

INTEGUMENTARY SYSTEM + Calcitriol -Most active form of Vitamin D -Hormone that aids in the absorption of calcium in foods from the Gastrointestinal Tract into the blood TACTILE SENSATIONS: 1. Crude touch – Ruffini corpuscles 2. Fine touch – Merkel discs 3. Pressure and Vibration – Lamellated or Pacinian corpuscles

Please bring out any piece of paper and prepare for a quiz..

QUESTION: 1. This protects the body, helps maintain a constant body temperature, and provides sensory information about the surrounding environment

QUESTION: 2. This is a group of tissues performing specific functions

QUESTION: 3. This is a group of organs performing specific functions

QUESTION: 4. This is the inherited inability to produce melanin

QUESTION: 5. This is the deeper part of the skin that is mainly composed of connective tissue

QUESTION: 6. These arise from red bone marrow and migrate to the epidermis, where they constitute a small fraction of the epidermal cells

QUESTION: 7. This is a yellow-red or brown-black pigment that contributes to skin color and absorbs damaging UV light

QUESTION: 8. This is the medical specialty that deals with the diagnosis and treatment of integumentary system disorders

QUESTION: 9. These are nerve endings that are sensitive to pressure and vibration

QUESTION: 10. This is the superficial portion of the dermis (1/5) which consists of areolar connective tissue with elastic fibers

QUESTION: 11. Yellowish color of the skin which indicates liver disease

QUESTION: 12. This is the permanent coloration of the skin in which a foreign pigment is deposited with a needle into the dermis

QUESTION: 13. This is the most active form of Vitamin D?

QUESTION: 14. These are the least numerous of the epidermal cells

QUESTION: 15. These are the most numerous epidermal cells

Add a comment

Related presentations

Related pages

Studiengänge A–Z | Studienangebot | Vor dem Studium ...

Praktika. Im Bachelorstudiengang Biological Sciences ist ein außeruniversitäres Praktikum nicht verpflichtend. Aufgrund der hohen Prüfungsdichte im ...
Read more

Biological Sciences | University of Oxford

Biological Sciences is an exciting and rapidly developing subject area. The study of living things has undergone tremendous expansion in recent years, and ...
Read more

Biology - Wikipedia, the free encyclopedia

Biology is a natural science concerned with the study of life and living organisms, including their structure, function, growth, evolution, distribution ...
Read more

Biological sciences - Latest research and news | Nature

Find the latest research, reviews and news about Biological sciences from across all of the Nature journals.
Read more

Biological science - definition of biological science by ...

Related WordsSynonymsLegend: Switch to new thesaurus Noun 1. biological science - the science that studies living organisms biology cell - (biology) the ...
Read more

Biological Sciences - Master | Universität Konstanz

Degree: Graduate studies; requires an undergraduate university degree The University of Konstanz also offers an undergraduate programme with a Bachelor's ...
Read more

Felix Ebner - Biological Sciences - Universität Konstanz ...

XING ist Deutschlands größtes berufliches Netzwerk: Mit XING finden Sie Ihren Traumjob, knüpfen wertvolle Kontakte, tauschen Wissen aus – und haben ...
Read more

Biological Sciences auf Bachelor - Universität Konstanz ...

Biological Sciences an der Universität Konstanz - hier gibt es Infos zur Regelstudienzeit, Zulassung, Bewerbung und Studienbeiträgen für den Bachelor.
Read more

Department of Biological Sciences - Louisiana State University

Includes graduate, undergraduate, faculty and staff, events, and course offerings. Find out about the microscopy, herbarium and museum of natural science.
Read more

Graduate School for Biological Sciences at the University ...

Graduate Training in Cologne Experience extending over many years is one of the major resources for an excellent graduate training in Biological Sciences.
Read more