1. Cardiovascular System

2. Components
Includes:
Heart
Blood vessels
Blood

3. Function Transports nutrients and oxygen to the body
Removes metabolic waste and carbon dioxide from cells
Distributes hormones and antibodies throughout the body
Helps control body temperature and electrolyte balance

4. The Heart Is a two-sided, hollow organ about the size of a fist.
Located in the mediastinal cavity
Has three layers of tissue:
Pericardium – outer layer,
reduces friction as the heart beats
Myocardium – middle layer,
pumps blood through the system
Endocardium – inner layer,
allows the blood to flow smoothly

5. Chambers of the Heart
Septum – muscular wall that separates the heart into the right and left sides
Each side is divided into two parts
Atria – two top chambers
Ventricles – two bottom chambers
Blood enters the heart
through the atria
Blood leaves through
the ventricles

6. Heart Valves
Atrioventricular - located between the atria and the ventricles on each side of the heart.
Tricuspid valve – right side
Bicuspid valve – left side
Semilunar - located between
the ventricles and the vessels
where blood leaves the heart.
Pulmonary valve
Aortic valve

7. Circulation of Blood
Pulmonary
Systemic
Coronary

8. Pulmonary Circulation
Flow of blood between the heart and lungs
The right side of the heart pumps deoxygenated blood to the lungs.
Carbon dioxide is exchanged for oxygen.
Oxygenated blood
returns to the left side
of the heart.

9. Systemic Circulation Flow of blood between the heart and body
The left side of the heart
pumps oxygenated blood to
the body.
Blood returns to the right side
of the heart

10. Coronary Circulation Flow of blood to the heart muscle
The left side of the heart pumps oxygenated blood to heart tissue
Blood returns to the right side of the heart.

11. Blood Flow Through the Heart
Superior & inferior vena cava
Right atrium
Tricuspid valve
Right ventricle
Pulmonary semilunar valve
Pulumonary arteries
Lungs to exchange gases
Pulmonary veins
Left atrium
Bicuspid / Mitral valve
Left ventricle
Aortic semilunar valve
Aorta all parts of the body
Arteries
Arterioles
Capillaries
Venules
Veins

12. Intrinsic Conduction System
Automaticity-enables heart to contract rhythmically and continuously without motor nerve impulses
SA (sinoatrial) Node: pacemaker located where the superior and inferior vena cava enter the right atrium
AV (atrioventricular) Node: sends impulses to ventricles
Bundle of His/Bundle Branches: in septum
Purkinje Fibers: in heart wall to distribute nerve impulses

13. Electrical Cardiogram