These textbooks will be distributed among all the students of our group. 2. Harvey collected ideas of the circulation of blood which until then had been studied but not confirmed by experiments. 3. Lymph passes through the lymphatic glands which act as filters and keep back any poisonous material, such as germs that has been brought to them in the lymph. 4. Those who have been in close contact with the infected patients must be quarantined for a time. 5. The heart muscle is nourished by coronary arteries. 6. When the left ventricle is contracting its contained blood is being forced into the aortic artery.
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