BLOOD GAS TRANSPORT PART 2 - PowerPoint PPT Presentation

Loading...

PPT – BLOOD GAS TRANSPORT PART 2 PowerPoint presentation | free to download - id: 55f050-MjkzN



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

BLOOD GAS TRANSPORT PART 2

Description:

BLOOD GAS TRANSPORT PART 2 Instructor Terry Wiseth PHYSIOLOGY OF DIVING PHYSIOLOGY OF DIVING Aquatic mammals can spend up to 10 minutes under water without breathing ... – PowerPoint PPT presentation

Number of Views:76
Avg rating:3.0/5.0
Slides: 23
Provided by: NORTHLAND8
Category:
Tags: blood | gas | part | transport | blood

less

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

Title: BLOOD GAS TRANSPORT PART 2


1
  • BLOOD GAS TRANSPORT PART 2
  • Instructor Terry Wiseth

2
PHYSIOLOGY OF DIVING
3
PHYSIOLOGY OF DIVING
  • Aquatic mammals can spend up to 10 minutes under
    water without breathing
  • ex whales, seals, dolpins etc
  • Trained free divers (human) can spend a minute or
    more under water without breathing

4
PHYSIOLOGY OF DIVING
  • Needs of O2 for metabolism is provided by
  • O2 stored in lungs
  • O2 bound to Hb
  • Myoglobin
  • Dissolved O2 in body fluids

5
PHYSIOLOGY OF DIVING
  • Largest physiological problem in diving is
    maintaining heart and brain function

6
PHYSIOLOGY OF DIVING
  • Diving reflex
  • Cardiovascular response to immersion of the head
    in water
  • Slowing of the heart rate by several beats per
    minute
  • More profound if the water is cold

7
PHYSIOLOGY OF DIVING
  • Combines with peripheral vasoconstriction and
    reduced metabolism induced by hypothermia
  • Increases the chances of survival for drowning
    victims in cold water

8
PHYSIOLOGY OF DIVING
  • Aquatic animals
  • Reflexive bradycardia and peripheral
    vasoconstriction
  • Effect is to force skeletal muscle to draw on its
    store of O2 in myoglobin and then shift to
    anaerobic glycolysis

9
PHYSIOLOGY OF DIVING
  • Various marine mammals have been found to have
    adapted special abilities which help in their
    respiratory processes, enabling them to remain
    down at great depths for long periods of time

10
PHYSIOLOGY OF DIVING
  • The Weddell seal only stores 5 of its oxygen in
    its lungs, and keeps the remaining 70 of its
    oxygen circulating throughout the blood stream
  • Humans are only able to keep a small 51 of their
    oxygen circulating throughout the blood stream,
    while 36 of the oxygen is stored in the lungs

11
PHYSIOLOGY OF DIVING
  • The explanation for this is that the Weddell seal
    has approximately twice the volume of blood per
    kilogram as humans
  • As well, the Weddell seal's spleen has the
    ability to store up to 24L of blood

12
PHYSIOLOGY OF DIVING
  • It is believed that when the seal dives the
    spleen contracts causing the stored oxygen
    enriched blood to enter the blood stream

13
PHYSIOLOGY OF DIVING
  • Also, these seals have a higher concentration of
    a certain protein found within the muscles known
    as myoglobin, which stores oxygen
  • The Weddell seal contains 25 of its oxygen in
    the muscles, while humans only keep about 12 of
    their oxygen within the muscles

14
PHYSIOLOGY OF DIVING
  • Not only does the Weddell seal store oxygen for
    long dives, but they consume it wisely as well
  • A diving reflex slows the pulse, and an overall
    reduction in oxygen consumption occurs due to
    this reduced heart rate

15
PHYSIOLOGY OF DIVING
  • Regulatory mechanisms reroute blood to where it
    is needed most (brain, spinal cord, eyes, adrenal
    glands, and in some cases placenta) by
    constricting blood flow where it is not needed
    (mainly in the digestive system)

16
PHYSIOLOGY OF DIVING
  • Blood flow is restricted to muscles during long
    dives and they rely on oxygen stored in their
    myoglobin and make their ATP from fermentation
    rather then from respiration

17
PHYSIOLOGY OF DIVING
  • scuba divers
  • If working at depths greater than 30 meters a
    diver breathes air at higher than atmospheric
    pressure and can accumulate dissolved gases in
    blood and tissues

18
PHYSIOLOGY OF DIVING
  • If divers return to the surface is too rapid the
    dissolved gas comes out of solution forming
    bubbles in tissues and blood vessels (mainly N2)
    bends
  • Condition is prevented by controlled decompression

19
SCUBA DIVER
20
PHYSIOLOGY OF DIVING
  • Diving animals exhale at the start of a dive
  • Increased pressure of diving to considerable
    depths decreases the volumes of gases in the
    lungs to the point of causing the lungs to
    collapse

21
PHYSIOLOGY OF DIVING
  • Reduced air volume in lungs where gases are
    exposed to capillaries minimizes the transfer of
    dissolved N2 to the animals blood
  • Bubble formation is not a problem when the animal
    returns to the surface

22
END BLOOD GAS TRANSPORT PART 2
About PowerShow.com