18. How many chambers does the human heart have? 19. Which side of the heart carries oxy blood? 20. Which side of the heart carries deoxy blood? 21. Trace the path of blood from the lungs to the legs. List all structures in flowchart format

18. The human heart has **four** chambers.<br /><br /><br />19. The **left** side of the heart carries oxygenated (oxy) blood.<br /><br /><br />20. The **right** side of the heart carries deoxygenated (deoxy) blood.<br /><br /><br />21. Path of blood from the lungs to the legs:<br /><br />```<br />Lungs --> Pulmonary Veins --> Left Atrium --> Left Ventricle --> Aorta --> Iliac Arteries --> Femoral Arteries --> Leg tissues<br />```<br />