1 / 16

Introduction to Body Organization

Introduction to Body Organization. Anatomy-Physiology I … here we go!. Human Body Introduction. Made of about the same 20+ elements found in dirt. http://serc.carleton.edu/images/usingdata/nasaimages/carbon_atom.gif. What is the Body Made of?. A) 70-85% water B) 10-20% protein

lizina
Télécharger la présentation

Introduction to Body Organization

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Introduction to Body Organization Anatomy-Physiology I … here we go!

  2. Human Body Introduction • Made of about the same 20+ elements found in dirt. http://serc.carleton.edu/images/usingdata/nasaimages/carbon_atom.gif

  3. What is the Body Made of? • A) 70-85% water • B) 10-20% protein • C) Remaining %: • salts, • Carbohydrates, • lipids, • nucleic acids

  4. Six Levels of Organization 2. cellular 1. chemical 3. tissue 6. Organism 5. System 4. Organ

  5. Claude Bernard Claude Bernard 1813-1878 • Said that “cells of many-celled organisms flourish because they live in relative constancy of the internal environment”. http://scienceworld.wolfram.com/biography/pics/Bernard.jpg

  6. Walter B. Cannon 1871-1945 • Coined the term “homeostasis” = the condition of equilibrium in the body’s internal environment. It is dynamic and always responding to changes in the environment.

  7. Feedback Systems • = a cycle of events in which the status of a body condition is continually monitored, evaluated, changed, re-monitored,… • Examples of controlled conditions: • Body temperature • Blood pressure • Glucose level in blood

  8. Components of Feedback Systems • 1) Receptor • 2) Control Center • 3) Effector

  9. Negative Feedback • = when the response reverses the original stimulus • EX) Blood Pressure (BP) • External stimulus causes BP to rise • Baroreceptors (pressure sensitive cells) located in blood vessels detect higher BP • Message is sent to brain • Brain decreases heart rate to lower BP http://www.clipartof.com

  10. Positive Feedback • = when response enhances or intensifies the original stimulus • EX) Childbirth • 1) 1st labor contractions push baby downward into lower uterus • 2) stretch sensitive nerve receptors monitor the stretching (controlled condition) of uterus • 3) the more stretch, the more oxytocin is sent from brain to intensify the contractions • Cycle/loop is broken by birth

  11. Tissues terminology • Histology • Pathologist • Biopsy http://www.nlm.nih.gov/medlineplus/ency/images/ency/fullsize/1102.jpg

  12. Four primary tissues of the body • 1. Connective Tissue http://www.unm.edu/~vscience/image0

  13. Four primary tissues of the body • 1. Epithelial Tissue http://www.stegen.k12.mo.us/tchrpges/sghs/ksulkowski/images/_Apical_Epithelial_Tissue.jpg

  14. Four primary tissues of the body • 3. Muscle Tissue http://www.stegen.k12.mo.us/tchrpges/sghs/ksulkos_Apical_Epithelial_Tissue.jpg

  15. Four primary tissues of the body • 4. Nervous Tissue

  16. Primary Germ Layers • 1. Ectodermdevelops into nervous system, epidermis • 2. Mesodermgives rise to all connective tissues, most muscle, blood and blood vessels • 3. Endodermgives rise to GI tract, bladder, and respiratory tract http://universe-review.ca/I10-13-layers.jpg

More Related