Question 58 Which chambers of the heart are connected by the mitral valve? Right atrium, left ventricle Left atrium, left ventricle Right atrium, right ventricle Left atrium, right ventricle Question 59 Where does the exchange of waste materials and oxygen take place? Venules Capillaries Arteries Veins

**Question 58:**<br /><br />The correct answer is **Left atrium, left ventricle**. The mitral valve (also known as the bicuspid valve) controls blood flow between these two chambers, preventing backflow into the left atrium when the left ventricle contracts.<br /><br />**Question 59:**<br /><br />The correct answer is **Capillaries**. Capillaries are the smallest blood vessels and have thin walls that allow for the efficient exchange of oxygen, nutrients, carbon dioxide, and other waste products between the blood and the surrounding tissues.<br />