28. How does the sexual
arousal mechanism in women
facilitate fecundation?

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
During sexual arousal in the
vagina secretes substances neutralize
its acidity thus the survival of
sperm within it. During the
fertile period hormones make mucus
that covers the surface of the
uterus viscous to help the
of sperm cells to uterine tubes.
During copulation uterine cervix
advances inside vagina to facilitate
the of male gametes through
cervical canal.