Download CV System Powerpoint

Cardiovascular
System
Fun Facts!!!
 If
we looked at all the blood vessels in
your body, what would the total length
be?

Around the world twice!
 How
many times will your heart beat in a
lifetime?

3 billion!!
1. Functions of CV system
Provides
nutrients and
oxygen through blood
Carries away waste (CO2)
Helps fight disease
2.
The CV system consists of
three main parts
Heart, Blood, Blood Vessels
3. The Heart
 Consists
of 4 chambers
Atria – top 2 chambers
Ventricles – bottom 2 chambers
 Valves between the chambers
allow the blood to flow through
4. Blood
 Delivers
O2, and nutrients to cells and
carries away wastes
 Composed of:
 Plasma – watery fluid (about 55%)
 Red blood cells – contain hemoglobin
which carries O2
 White Blood cells – protect body
against disease
 Platelets – help blood clot
5. Blood Vessels – 3 types
 Artery
 Carries
oxygenated blood AWAY from
the heart
 Veins
 Return blood TO the heart
 Capillaries
 Very small vessels that connect
arteries to veins
Lets see how the heart works
 Pathway
of Blood
1. Blood enters through superior and
inferior vena cava
2. The blood enters the right
atrium
3. Blood spills into right ventricle
4. Blood enters the pulmonary
arteries.
5. From here, blood goes to
your lungs to pick up O2
6. Oxygen rich blood returns to your heart
through pulmonary veins
7. Blood enters left atrium.
8. Blood enters the left ventricle
9. Blood is pumped through the aorta and
delivered to rest of body.
Pathway of Blood Through the
Heart
 Any
questions?
 Lets watch it again…
 Pathway
of Blood