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1. Blood islands are ________.
 
 
 
 

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2. Which of the following statements is true?
 
 
 
 

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3. The ductus venosus is a shunt that allows ________.
 
 
 
 

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4. Critical Thinking: All tissues, including malignant tumors, need a blood supply. Explain why drugs called angiogenesis inhibitors would be used in cancer treatment.

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5. Critical Thinking: Explain the location and importance of the ductus arteriosus in fetal circulation.

Question 5 of 5