1. The Circulatory System
A bloody business
The Circulatory System
Prof. Luigi García Saavedra

2. Functions Transport of oxygen and nutrients
Removal of wastes from tissues
Carry elements of the immune system
Regulates temperature
Transport of hormones

3. The Heart

4. Structure Tissue: Cardiac muscle (Myocardium)
4 chambers, separated by the Septum:
2 upper chambers: Atria
2 lower chambers: Ventricles

5. 2 pumps – 2 circulations: Pulmonary (Right heart)
Systemic (Left heart)

6. The Valves of the Heart Right Atrium TRICUSPID VALVE Right Ventricle
Left Atrium MITRAL VALVE Left Ventricle

7. Other valves Pulmonary Valve: Right ventricle-Pulmonary artery
Aortic Valve: Left ventricle-Aorta
Valves in veins

8. The Hearts´s Blood Supply
Coronary Arteries (branch from the Aorta)

9. Pulmonary Circulation
Inferior vena cava and Superior vena cava
Right Atrium
Right Ventricle (Tricuspid Valve)
Pulmonary artery (Pulmonary Valve)
Lungs

10. Systemic Circulation Pulmonary Veins Left Atrium
Left Ventricle (Mitral Valve)
Aorta (Aortic Valve)
Tisssues

12. Heartbeat Atrial contract Ventricle contract Sinoatrial node
Atrioventricular node

13. End of Class 1

14. Blood Vessels

15. Blood Pressure
When the heart contracts, a wave of fluid pressure in the arteries (blood pressure)
The elasticity of the arterial walls maintains the pressure.

16. There are sensory receptors in blood vessels
High blood pressure: Autonomic nervous system releases neurotransmitters that relax the smooth muscles in blood vessel walls
Kidneys also help regulate blood pressure by regulating the level of water in the blood in response to hormones released by the heart and other organs

17. The Blood

18. Proteins of the Blood
Albumin and Globulins: transport substances like fatty acids, hormones and vitamins
Albumin: regulates osmotic pressure and blood volume
Globulins: some of them fight viral infections
Fibrinogen: necessary for blood clotting

20. Erythrocytes

22. The Lymphatic System

23. The Lymphatic System
Network of vessels, nodes and organs that collects the lymph that leaves capillaries, “screens” ir for microorganisms and returns it to the circulatory system
Lymph: fluid that leaves the blood and goes in between the cells, carrying nutrients, dissolved oxygen, salts, etc.

24. Role in Circulation
Role in Nutrient Absorption
Role in Immunity

25. End of Class 2

26. Diseases of The Circulatory System

30. End of Circulatory System