Download Chapter 6 Circulatory System

Circulatory System
Functions of Circulatory System
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Transportation
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Oxygen
Nutrients
Hormones
Antibodies
Carbon dioxide
Waste
Fluid balance
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Intracellular fluid
• Fluid in a cell
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Extracellular fluid
• Fluid surrounding a
cell
Parts of the Circulatory
System
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3 main parts
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Heart
• Pumps blood
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Blood
• Transports nutrients
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Vessels
• Blood travels through
Divisions of Circulatory
System
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Pulmonary
circulation
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Blood circulating
from heart
To lungs
Back to the heart
Divisions of Circulatory
System
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Systemic circulation
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Blood circulates from
the heart
To all cells and tissue
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Except lungs
Back to the heart.
Heart
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Function
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To pump and receive
blood.
• 2 pumps in one
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Right heart
• Receives and pumps
deoxygenated blood
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Left heart
• Receives and pumps
oxygenated blood
Chambers of the Heart
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Atria
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Upper chambers
• R+ L atrium
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Receive blood
Ventricle
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Lower chambers
• R + L ventricle
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Pumping chambers
Valves
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One way ‘doors’
between chambers
Blood Flow through the Heart
Layers of the Heart
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Endocardium
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Inside layer
Myocardium
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Middle layer
• Heart wall
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Epicardium

Outside layer of
heart
• Inside layer of the
pericardium
Layers of the Heart
Pericardium
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Pericardium

Double walled sac
that surrounds the
heart
• Produces pericardial
fluid
• Reduces friction
created w/ heart
beats
Blood
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Function
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To move blood cells
throughout the body.
Plasma
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Liquid portion
• 90% water
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Corpuscles
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Blood cells
• Erythrocytes
• Leukocytes
• Thrombocytes
Corpuscles / Blood Cells
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Erythrocytes
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RBC’s (red blood cells)
Contain hemoglobin
• Carry O2
• Eliminate CO2
• ‘transporters’
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Thrombocytes
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Platelets
• Clot the blood
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Leukocytes
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WBC’s (white blood cells)
‘infection fighters’
5 types
• Basophils
• Eosinophils
• Lymphocytes
• Monocytes
• Neutrophils
Vessels
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Function

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To carry blood / blood
cells to all the parts of
the body.
3 main types
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Arteries
Veins
Capillaries
Artery
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Largest blood vessel

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Carry blood away
from the heart
Spurt if cut
Can detect a pulse
Vein
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Smaller than arteries

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Carry blood back to
the heart.
Closer to skin
• Appear ‘bluish’
• Do not spurt w/ cut
• Cannot detect a
pulse
Capillary
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Smallest of the
vessels
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Microscopic
Connect arteries to
the veins.
Gas exchange takes
place
• O2
• CO2
Conclusion
 The
circulatory system in dentistry is
related to overall health, oral infection,
and administration of medications.
 Any
questions??????
1. What are the three
types of vessels?
2. Order the three
types of vessels from
the smallest to the
largest unit
3. What are the three
parts of the
circulatory system?
4. What is the
difference between
pulmonary and
systemic circulation?
5. What are the three
layers of the heart?