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Cardiovascular System

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The cardiovascular system consists of the heart, blood, and blood vessels. ... Blood. Red blood cells make up about 40 percent of normal blood. They contain ... – PowerPoint PPT presentation

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Title: Cardiovascular System


1
Cardiovascular System
  • Body System
  • Mrs. Pogue
  • Health 1000

2
Why the Blood Circulates
  • The cardiovascular system provides
    __________________________________________________
    ______________.
  • Your heart pumps blood to your bodys cells 24
    hours a day, even when youre asleep.

3
Why the Blood Circulates
  • Your heart accomplishes these important tasks
  • ___________________________ from the lungs to
    body cells
  • Absorbing nutrients from food and delivering
    nutrients to body cells
  • Carrying carbon dioxide from your cells back to
    your lungs to be exhaled
  • Delivering other waste products to the kidneys
    for removal from the body
  • Helping the ________________ cells fight disease
    by attacking infectious organisms

4
How the Blood Circulates
  • The cardiovascular system consists of the heart,
    blood, and blood vessels.
  • Your heart is the muscle that makes the
    cardiovascular system work.

5
The Heart
  • Inside the heart are four chambers separated by a
    wall of tissue called the septum.
  • The two top chambers are called the ________.
  • The two lower chambers are called
    ________________.

6
The Heart
  • Valves between the atria and ventricles allow
    blood to flow through the chambers.
  •  
  • At the top of the right atrium is an area of
    muscle that acts as a pacemaker for the heart.

7
The Heart and Lungs
8
How Blood Circulates
  • Pulmonary circulation is the process by which
    blood moves between the heart and the lungs.
  • Blood that has lost oxygen and picked up carbon
    dioxide and wastes receives fresh oxygen in the
    lungs.

9
Blood
  • Blood is the fluid that ______________,
    ___________, and nutrients to the cells and
    carries away wastes.

10
Blood
Components of Blood
Red Blood Cells
WhiteBlood Cells
________
________
11
Blood
  • About 55 percent of total blood volume consists
    of ___________, which is mainly water, but it
    also contains nutrients, proteins, salts, and
    hormones.

____________
The fluid in which other parts of the blood are
suspended
12
Blood
  • Red blood cells make up about 40 percent of
    normal blood. They contain __________________.

______________
The oxygen-carrying protein in blood
13
Blood
Surrounding and ingesting the organisms that
cause disease
White blood cells have one of three purposes
Forming antibodies that provide immunity against
a second attack from that specific disease
Fighting allergic reactions
14
Blood
  • When the wall of a blood vessel tears,
    ___________ collect at the tear and form a clot
    that blocks the flow of blood.

______________
Types of cells in the blood that cause blood
clots to form
15
Blood
  • Millions of each type of blood cell can be found
    in just 1 millimeter of blood.

16
Blood
Humans have one of four types of blood.
A
B
AB
O
(contains antigens)
(contains antigens)
(contains antigens)
(does not contain antigens)
17
Blood
  • A person with blood types A, B, or AB must
    receive blood from someone with the same blood
    type due to the antigens or from someone with
    type O blood because it has no antigens.

18
Blood
  • People with type O blood are called universal
    donors, because anyone can receive their blood.

19
Blood Vessels
Arteries
The Three Main Types of Blood Vessels
Capillaries
Veins
20
Blood Vessels
  • _____________ are vessels that branch into
    progressively smaller vessels called arterioles,
    which deliver blood to capillaries.

____________
Blood vessels that carry oxygenated blood away
from the heart
21
Blood Vessels
  • ________________ reach almost all body cells.
    Capillaries near the skins surface can dilate or
    constrict to adjust body temperature.

_______________
Small vessels that carry blood from arterioles
and to small vessels called venules, which empty
into veins
22
Blood Vessels
  • The large ___________, the vena cava, carry
    deoxygenated blood to the right atrium. Pulmonary
    veins carry oxygenated blood to the left atrium.

23
How Lymph Circulation Works
  • Lymph is filtered by lymph nodes, small
    bean-shaped organs found in lymph vessels.
  •  
  • White blood cells within lymph nodes trap and
    destroy pathogens.

24
Blood Pressure
  • Maintaining blood pressure in the cardiovascular
    system is important for proper blood circulation.

Blood pressure
A measure of the amount of force that the blood
places on the walls of blood vessels,
particularly large arteries, as it is pumped
through the body
25
Blood Pressure
___________________
The maximum pressure as your heart contracts to
push blood into your arteries.
A blood pressure reading includes two numbers.
____________________
The pressure at its lowest point when your
ventricles relax.
26
Blood Pressure
  • A healthy persons blood pressure will vary
    within a normal range of below 120/80.
  •  
  • Blood pressure that is above 140/90 is considered
    high and places a strain on the heart.
  •  

27
Cardiovascular System Problems
Conditions of the heart that are present at
birth.
Congenital heart defects
28
Lymphatic System Problem
Your tonsils help reduce the number of pathogens
entering the body through the respiratory system.
If the tonsils become infected, tonsillitis
results.
Tonsillitis
Immune deficiency results if the immune system is
weakened and can no longer protect the body
against infection.
Immune deficiency
Also called Hodgkins lymphoma, this type of
cancer affects the lymph tissue in lymph nodes
and the spleen.
Hodgkins disease
29
Sources
  • Glencoe Health 2009
  • http//www.nlm.nih.gov/medlineplus/ency/images/enc
    y/fullsize/19192.jpg
  • http//www.eurobloodsubstitutes.com/images/heartCi
    rcul_arteries.gif
  • http//www.rci.rutgers.edu/uzwiak/AnatPhys/Blood_
    Vessels_files/image004.jpg
  • http//www.astrographics.com/GalleryPrints/Display
    /GP2146.jpg
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