Transcript Cardiovascular Notes

What Does C-V System do?
 Circulate blood throughout entire
body for
Transport of oxygen to cells
Transport of CO2 away from cells
Transport of nutrients (glucose) to cells
Movement of immune system
components (cells, antibodies)
 Transport of endocrine gland secretions
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What are the Parts?
 Heart
 Blood Vessels
 Arteries Away from Heart
 Veins to Heart
 Diffusion happens in capillaries (oxygen, CO2,
glucose diffuse in or out of blood)
 Blood
Two circulatory paths
Systemic (Body)
Pulmonary
(Lungs)
Location of Heart in Thorax
pg 523
Heart Chambers and Valves
Another View
Types of Blood Vessels
 Arteries
-Carry blood away from the Heart
-The Aorta is the largest artery
 Veins
-Carry blood to the Heart
-Veins contain valves
-The Vena Cava is the largest vein
 Capillaries
-Known as the “Distribution Pipes”
Artery/Vein differences
Arteries
Veins
Direction
of flow
Blood Away
from Heart
Blood to Heart
Pressure
Higher
Lower
Walls
Thicker
Thiner
Lumen
Smaller
(diameter)
Valves
No valves
Larger
Valves (see next)
Capillaries
 Microscopic--one cell
layer thick
 Network
 Entire goal of C-V
system is to get blood
into capillaries where
diffusion takes place
Hepatic Portal System
The Composition of Blood
 The Plasma (Fluid)
makes up 55% of
the blood volume.
Blood Composition
60
50
 The Solids (Cells)
make up 45% of
the blood volume.
40
30
20
10
0
Plasma
Solids
Blood Plasma
 97% Water
 Other 3%
-Antibodies and Proteins
- Nutrients and Wastes
Blood Solids
 Red Blood Cells
-Carry oxygen
-Contain Hemoglobin
 White Blood Cells
-Attack bacteria & other invaders
 Platelets
-Control the blood clotting process