Answer:
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Explanation:
Lines of latitude are used
The pulmonary circuit transports blood to the lungs. The blood is oxygenated there and then carried back to the heart. Gaseous exchange happens in the lungs:
Carbon dioxide diffuses from the blood into the air in the alveoli.
The big dipper is in the north east. The famous star Mizar is located second to the end of the big dippers handle.