Chapter 6 Circulatory System
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Transcript Chapter 6 Circulatory System
Circulatory System
Functions of Circulatory System
Transportation
Oxygen
Nutrients
Hormones
Antibodies
Carbon dioxide
Waste
Fluid balance
Intracellular fluid
• Fluid in a cell
Extracellular fluid
• Fluid surrounding a
cell
Parts of the Circulatory
System
3 main parts
Heart
• Pumps blood
Blood
• Transports nutrients
Vessels
• Blood travels through
Divisions of Circulatory
System
Pulmonary
circulation
Blood circulating
from heart
To lungs
Back to the heart
Divisions of Circulatory
System
Systemic circulation
Blood circulates from
the heart
To all cells and tissue
Except lungs
Back to the heart.
Heart
Function
To pump and receive
blood.
• 2 pumps in one
Right heart
• Receives and pumps
deoxygenated blood
Left heart
• Receives and pumps
oxygenated blood
Chambers of the Heart
Atria
Upper chambers
• R+ L atrium
Receive blood
Ventricle
Lower chambers
• R + L ventricle
Pumping chambers
Valves
One way ‘doors’
between chambers
Blood Flow through the Heart
Layers of the Heart
Endocardium
Inside layer
Myocardium
Middle layer
• Heart wall
Epicardium
Outside layer of
heart
• Inside layer of the
pericardium
Layers of the Heart
Pericardium
Pericardium
Double walled sac
that surrounds the
heart
• Produces pericardial
fluid
• Reduces friction
created w/ heart
beats
Blood
Function
To move blood cells
throughout the body.
Plasma
Liquid portion
• 90% water
Corpuscles
Blood cells
• Erythrocytes
• Leukocytes
• Thrombocytes
Corpuscles / Blood Cells
Erythrocytes
RBC’s (red blood cells)
Contain hemoglobin
• Carry O2
• Eliminate CO2
• ‘transporters’
Thrombocytes
Platelets
• Clot the blood
Leukocytes
WBC’s (white blood cells)
‘infection fighters’
5 types
• Basophils
• Eosinophils
• Lymphocytes
• Monocytes
• Neutrophils
Vessels
Function
To carry blood / blood
cells to all the parts of
the body.
3 main types
Arteries
Veins
Capillaries
Artery
Largest blood vessel
Carry blood away
from the heart
Spurt if cut
Can detect a pulse
Vein
Smaller than arteries
Carry blood back to
the heart.
Closer to skin
• Appear ‘bluish’
• Do not spurt w/ cut
• Cannot detect a
pulse
Capillary
Smallest of the
vessels
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?