1. Cardiovascular structure and function
Module 1- Anatomy and Physiology

2. Cardiovascular System
Used to deliver oxygen to working tissues
Oxygen diffuses into blood from alveoli to capillaries
Blood travels from lungs to heart
Heart to peripheries
Periphery to heart
Heart to lungs
Right ventricle pumps blood to lungs (pulmonary circulation)
Left ventricle pumps blood to rest of body (systemic circulation)

3. Figure 1.9

4. Control of Cardiovascular System
Contraction of heart muscle is not voluntary
It is controlled by the heart’s electrical conduction system
Begins in the SA Node
Through the atria
Then the AV Node (delayed)
Then the ventricles

5. Figure 1.11

6. Electrical Activity of the Heart
P wave is the
depolarization of
atria
QRS Complex is
the depolarization
of the ventricles
T wave is the
repolarization of
the ventricles
Repolarization of atria is masked by QRS complex
Contraction of heart chambers is called systole
Relaxation of heart chambers is called diastole