Transport Systems in Animals: Circulatory Systems - PowerPoint PPT Presentation

Loading...

PPT – Transport Systems in Animals: Circulatory Systems PowerPoint presentation | free to view - id: 1e898-OTFhM



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

Transport Systems in Animals: Circulatory Systems

Description:

To do all of this, the circulatory system must come into contact with most ... Which type of circulatory system would be advantageous to life on land? ... – PowerPoint PPT presentation

Number of Views:3533
Avg rating:3.0/5.0
Slides: 36
Provided by: Barn3
Category:

less

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

Title: Transport Systems in Animals: Circulatory Systems


1
Transport Systems in Animals Circulatory Systems
2
What is the role of the circulatory system?
  • maintain internal homeostasis
  • deliver oxygen, food and other nutrients
    throughout the body
  • remove CO2 and other metabolic wastes
  • maintain cells in a fluid environment that allows
    exchange of these many materials

3
To do all of this, the circulatory system must
come into contact with most tissues in the human
body.
4
Which of the organisms below have transport
systems? Which do not?
How can the paramecium and hydra thrive with no
circulatory system?
5
Open vs. Closed Systems
Which system seems more efficient? What are your
reasons?
6
There are several types of transport systems in
animals
  • Animals that have true circulatory systems
    contain specialized circulatory fluid- Blood
  • Open Circulatory System
  • Body fluid is pumped through open ended vessels
    and bathes organs.
  • Occurs in insects, crabs, and other animals that
    carry their skeleton outside of their body
  • Blood is circulated by the heart

7
  • A closed circulatory system
  • blood is confined in vessels.
  • Major vessels branch into smaller vessels that
    carry blood to organs.
  • Blood is pumped through the body by the heart.
  • Blood flow is faster than in an open system
  • Common in animals that move quickly and transport
    oxygen long distances.

8
Evolution of Vertebrate Circulatory Systems
  • Which type of circulatory system would be
    advantageous to life on land?
  • More efficient circulatory systems- the closed
    circulatory system.

9
Several types of blood vessels exist in the
circulatory systems of vertebrates.
  • What are the three types of blood vessels?
  • Arteries, capillaries, veins

10
Blood Vessels
  • Blood travels through three types of vessels
  • What are some differences you notice between
    these vessels?
  • 1. Arteries 2. Capillaries 3. Veins

11
What is the purpose of the valves found in veins?
Keep blood flowing toward the heart.
12
Why must the capillary walls be so thin?
So materials can diffuse through the wall for
exchange.
13
What are some differences between the wall of the
artery and the vein?
Artery walls are thicker to withstand the
increased pressure.
14
Blood Vessels - Summary
  • Arteries carry blood away from the heart,
    thickest walls
  • Veins carry blood toward the heart, thinner
    walls, one-way valves
  • Capillaries extremely thin walls, sites of
    exchange in lungs and body cells

15
How do these three different circulatory systems
compare?
What are systemic capillaries? Capillaries that
are located throughout the body
16
Circulation in Fish
How many chambers does the heart have? -2
chambered heart How many loops does this
circulatory system have? 1 Blood is oxygenated in
gills and travels to the body Heart? gills?
systemic? heart
17
Circulation in amphibians and reptiles
How many chambers does the reptilian heart
have? -3 chambered heart How many loops does this
circulatory system have? 2 (double loop
circulatory system) Trace the blood flow through
the body Heart? lungs? heart? systemic Where is
the inefficiency in the amphibian 3-chambered
system?
18
The Heart and Blood Flow in Mammals
  • How many chambers does the mammalian heart have?
  • -4 chambered heart
  • How many loops does this circulatory system have?
  • 2 (double loop circulatory system)
  • Trace the blood flow through the body
  • Heart? lungs? heart? systemic circuit
  • How is this heart more efficient than the
    reptilian heart?

19
Heart Animation
20
The Mammalian Heart
21
(No Transcript)
22
The Cardiac Cycle
  • The heart is composed of cardiac muscle and each
    beat is a muscle contraction and relaxation
  • Contraction Systolic Pressure
  • Relaxation Diastolic pressure
  • How is blood pressure written?
  • Systolic / diastolic

23
Blood Pressure
  • What is blood pressure?
  • The force that blood exerts against vessel walls
  • Is BP is greater in arteries or veins?
  • In arteries
  • Find your pulse- what are you feeling here?
  • Pulse is measure of BP
  • Which would have a higher blood pressure,
    constricted blood or dilated vessels?
  • Constricted vessels
  • Does the BP have an effect on veins?
  • No- the pressure is lost in the capillaries
  • How, then does blood move in veins?

24
  • What is average blood pressure?
  • 120/80 (mm Hg) of pressure on artery walls.
  • Which part of the heart contracts first?
  • The atria contract first, followed immediately by
    the ventricles.
  • Blood Pressure animation
  • Cardiac Cycle Exercises

25
(No Transcript)
26
  • Cardiac Output (CO)
  • Volume of blood pumped/ minute
  • Stroke Volume (SV)
  • Amount of blood pumped by the left ventricle each
    time it contracts (about 75 mL per beat for the
    average person)
  • 75 X 70 5 250 mL/min.
  • CO is affected by heart rate and SV
  • Myogenic heart can regulate its own rhythm
  • SA node is the pacemaker of the heart

27
How does the heart beat?
  • Can you control the beating of your own heart?
  • No- the heart muscles contract on their own.
  • The heart has a pacemaker, or SA node, that
    maintains the hearts rhythm.
  • Heart beat animation

28
The pacemaker sets the tempo of the heartbeat.
29
What is blood composed of?
  • Plasma
  • makes up 55 of your total blood volume
  • 90 water
  • 10 dissolved fats, salts, sugars and proteins.
  • Plasma carries nutrients, wastes and important
    proteins like antibodies and clotting factors.
  • Erythrocytes (RBCs)
  • contain hemoglobin and carry oxygen
  • Leukocytes (WBCs) fight disease

30
Blood Composition continued...
Diagramatic View
Real Blood Cells
31
(No Transcript)
32
RBC formation animation
33
Blood clotting animation
34
(No Transcript)
35
Homeostasis
  • What is homeostasis?
  • The ability of an organism to maintain a stable
    internal environment
  • How does this happen?
  • the organisms internal environment responds and
    adjusts to changes in the external environment.
  • The maintenance of a steady state
  • What are some examples of homeostasis in our
    bodies?
  • internal temperature, O2 conc., blood glucose
About PowerShow.com