Tuesday January 26, 2010 - PowerPoint PPT Presentation

Loading...

PPT – Tuesday January 26, 2010 PowerPoint presentation | free to download - id: 5a34b6-MDg5N



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

Tuesday January 26, 2010

Description:

Title: Welcome to Physiology B Author: Micki Lillie Last modified by: itsuser Created Date: 12/15/2006 9:13:22 PM Document presentation format: On-screen Show (4:3) – PowerPoint PPT presentation

Number of Views:28
Avg rating:3.0/5.0
Slides: 22
Provided by: MickiL
Learn more at: http://arapahoe.littletonpublicschools.net
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Tuesday January 26, 2010


1
Tuesday January 26, 2010
  • Pick up the hand-out.
  • Complete the
  • Health Career
  • Survey.

2
Agenda
  • Digestive system assessment due today!
  • Health Career Survey Discussion
  • Discuss Blood
  • Homework
  • Label the parts of the heart

3
The Cardiovascular System
  • Blood
  • Anatomy of the Heart
  • A. How it Works
  • B. Why it Fails
  • C. How to Fix it
  • Vessels Circulation
  • Dissection of Circulatory System

4
Blood What is it composed of?
  • A fluid tissue (connective tissue) that has many
    chemicals dissolved in it and millions of cells
    floating in it.
  • What is the fluid called?
  • What types of cells are dissolved in it?
  • What kinds of chemicals are dissolved in it?

5
A. Plasma liquid portion of blood or blood
minus its cells
  • Composition Water containing many dissolved
    substances (ex food, salt hormones)
  • Plasma is often analyzed to determine the
    concentration of food molecules, enzymes, and
    other clinically important plasma components

6
B. Bone Marrow
  • Bone Marrow is the site of blood cell (RBCs,
    WBCs, and Platelets) production
  • Hematopoiesis is the scientific term for blood
    cell production.

7
Hematopoiesis
  • Bone Marrow
  • Stem cells
  • Blood cells in immature stages of development
  • In Adults
  • Sternum, vertebrae
  • Pelvis
  • Epiphyses of the humerus and femur.

8
C. Cells (WBC, RBC, Platelets)
1. Leukocytes or WBC
  • Granulocytes
  • Basophils
  • Eosinophils
  • Neutrophils
  • Agranulocytes
  • Lymphocytes
  • Monocytes.

9
A. BASOPHILS
  • - Make up lt 1 of leukocytes
  • - Large dark nucleus is S- shaped, but usually
    obscure.
  • - Migrate to injury sites and discharge the
    contents of their granules
  • Histamine
  • Vasodilator
  • Increases capillary permeability.
  • Heparin
  • An anticoagulant.
  • Lifespan is not certain.

Granulocyte
10
B. Granulocyte - EOSINOPHIL
  • - Making up 1- 6 of WBCs
  • - Large, red, dense granules contain
    histamines
  • - Nucleus is usually bi-lobed

11
When EOSINOPHILS encounter something you are
allergic to (pollen, cat dander) they release
their granules into the blood and you have a
histamine reaction itchy, runny eyes and nose
A common class of drugs called
ANTI-HISTAMINES fight this reaction
12
C. Granulocyte -NEUTROPHIL
  • - MOST prevalent granulocyte approx. 40-75 of
    leukocytes
  • - Multi-lobed or sausage link nucleus
  • - Blue rods are phagocytosed microorganisms.

13
D. AGRANULOCYTES - Monocytes
  • 2-8 of circulating WBCs.
  • Notched nucleus is large kidney-shaped.
  • Responsible for ingestion of foreign substances
    in the body
  • Lifespan can be up to several months.

14
E. Agranulocytes - Lymphocytes
  • Lymphocytes
  • 20-30 of circulating WBCs.
  • Migrate bloodstream ? ? lymphatic tissue
  • Lifespan - hours to years
  • 2 Main Classes
  • T Lymphocytes defend against foreign cells and
    coordinate the immune response.
  • B Lymphocytes produce and distribute antibodies.

15
2. PLATELETS aka THROMBOCYTES
  • Disc-shaped, plasma membrane-enclosed fragments
    of cytoplasm that form by breaking off of larger
    cells called megakaryocytes.
  • Function to seal small tears in blood vessels,
    instrumental in blood clotting

16
Platelets Blood Clotting
  • A complex story of rapid fire reactions.
  • Injury occurs, platelets break up and release
    platelet factors
  • Platelets combine with prothrombin (protein in
    normal blood), to form thrombin
  • Thrombin reacts with fibrinogen (normal protein)
    to form fibrin

17
Why do we apply gauze to bleeding injuries?
  • The slight roughness causes more platelets to
    break down and release platelet factors, which
    make blood clot more quickly.
  • Vitamin K is often prescribed before surgery to
    ensure blood will clot fast enough to prevent
    hemorrhage. Vitamin K stimulates liver cells to
    increase synthesis of prothrombin.

18
Clotting Disorders
  • Thrombosis a clot stays in the place that it is
    formed (internal organ)
  • Embolism if part of the clot dislodges and
    travels through the blood stream
  • Hemophilia

19
3. Erythrocytes Red Blood Cells (RBC)
  • RBC normal count 41/2 5 million per mm3 of
    blood
  • Structure disk shaped without nuclei
    hemoglobin is an important component
  • Function Transport Oxygen and Carbon Dioxide

20
Lets practice Name the cell
Eosinophil
Platelet
Band/Stab Neutrophil
Lymphocyte
Neutrophil
Monocyte
Basophil
21
(No Transcript)
About PowerShow.com