_________ is a coiled tube where sperm mature. 

__________ helps nerve impulses travel faster on long axons. 

Cells in the _______ divide to form sperm. 

Describe the events that take place during a single respiratory cycle (inhalation and exhalation). Include information regarding changes in air pressure and the muscles involved.  

True or False: The urethra is part of the male urinary and reproductive systems. 

___________ are molecules that trigger a fever.

Which statement regarding antibodies is correct?

Which of the following associations is not correct?

Matching: Match each organ of digestion with its function. 

Cells in the heart’s _________ function as the heart’s pacemaker thanks to their ability to generate electrical signals.