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What is one function of the cardiovascular system?

What is one organ associated with the respiratory system? 

During coagulation, long, hairlike molecules known as ________ form the basis for a clot.

During repolarization, ________ ions are moved out of the cell.

The portions of the brain that contain respiratory centers and set the breathing rate are the ________.

________ is a fatty molecule made by alveolar cells to reduce surface tension and prevent alveolar collapse between breaths.

The only pair of cranial nerves to extend to the thoracic and abdominal cavities is the ________ nerves.

List one hormone from the pineal gland, and give it’s function