The Circulatory System

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Parts of The Circulatory or Cardiovascular System
and Their Functions
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Vessels
Blood Vessels

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Blood Vessels are tubes that carry blood to all
parts of our body. Some blood vessels carry blood
from our heart to all parts of our body. Other
blood vessels carry blood from other parts of our
body back to our heart
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Vessels
Heart

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Our Heart is the vital organ that pumps blood all
the time, to all parts of our body. Our heart is
made of a special muscle called heart muscle. The
muscle allows our heart to pump blood. We cant
control our heart muscles.
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Vessels
Heart

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Our Heart Has 4 Chambers
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Journey of Blood in Our Body
How does blood flow through our body?
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Pulse
How is our pulse measured?
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Our pulse rate

• Each heartbeat is a cycle of contraction and
  relaxation of our heart muscles. With every
  heartbeat, blood is pumped through our blood
  vessels, causing them to expand and relax.
• After every heartbeat,a wave of pressure passes
  along our blood vessels. It is similar to a
  ripple that spreads outwards from heart and
  pushes the blood through the blood vessels. This
  is known as our pulse

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• We can take our pulse by pressing two fingers on
  our wrist . The number of pulses in a minute is
  our pulse rate. Our pulse rate shows the number
  of times our heart beats in a minute. This is
  also called our heart rate. The rheart rate of
  an average healthy adult is 60 70 times per
  minute.

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Factors that affect our heart rate

• Our heart rate changes with our age, health and
  the type of activity we are doing.

• Health

Age


Activity
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Age

• Our heart rate decreases as we grow older
• Babys heart rate
• 120 times per minute
• Adults heart rate
• 60 90 times per minute
• Elderly persons heart rate
• 60-80 times per minute

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Health

• The heart rate of a healthy person is usually
  slower than that of sick person. A fast heart
  rate is also sometimes a sign of an illness.

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Activity

• When we exercise, our heart rate increases. This
  happens because our heart needs to bring more
  blood to different parts of our body. These parts
  need the oxygen and food that are carried by the
  blood to produce more energy

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Illnesses related to our circulatory system
What are some illnesses related to the ciculatory
system?

• Our circulatory system is an important system in
  our body. Damage to a part of our circulatory
  system may cause sickness or even death.
• Illnesses of the circulatory system may affect
  our
  
• Blood pressure
• Heart and blood vessels
• Blood
• Here are the common illnesses related to
  circulatory system

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Blood Pressure

• Hypertension
• Hypertension is also known as high blood
  pressure. It can lead to other medical conditions
  such as arteriosclerosis, heart attack, stroke,
  and kidney failure.
• Hypertension may be caused by smoking, a diet
  high in fat or salt, being overweight, lack of
  exercise, and even a high stress level in our
  life.

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Heart and Blood Vessels

• Arteriosclerosis
• A healthy diet is very important for the proper
  functioning of our circulatory system. If we have
  a diet with too much fat, fatty substances may
  collect on the inner walls of our arteries.
  Arteries are the blood vessels that carry blood
  from our heart to all parts of our body

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Arteriosclerosis

• Over time, the walls of the affected arteries
  stiffen. This condition is called
  arteriosclerosis. Blood flow becomes restricte
  and blood clots may develop in the blood vessels.
  Such clots may lead to a heart attack or a stroke.

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Damage in the heart or blood vessels

• Certain diseases destroy the heart valves that
  control the direction of blood flow through the
  heart.
• Some children suffer from congenital heart
  disorders as a result of incomplete development
  of the heart or its blood vessels before birth.
  Surgery is needed to correct such disorders.

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Blood

• Anaemia
• Anaemia is a disease of the blood. This disease
  occurs when the amount of red blood cells in our
  body is low. Since red blood cells carry oxygen,
  there will be a lack of oxygen carried to the
  cells in our body.
• Anaemia is caused by a lack of iron in our diet
  or large amounts of blood loss.

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Leukimia

• A more serious disease of the blood is leukimia.
  It is also known as cancer or the blood or bone
  marrow. This disease occurs when white blood
  cells multiply abnormally in the bone marrow.

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Keeping our circulatory system healthy

• A healthy circulatory system can be achieved
  through a healthy diet and lifestyle. This means
  that we should
• Exercise regularly
• Not smoke, consume alcohol or take drugs
• Have a balanced diet
• Drink a lot of water
• Go for annual body checkup

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Relationship Between The Digestive, Circulatory,
and Respiratory Systems
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By Sirhan