The
infundibulum's mucosa is quite rugated, and extensive folds are
present, but even so, compared to the upper end of the mammalian
reproductive tract, it's very open. This is to be expected in light
of the size of the egg it has to carry.
The
infundibulum's mucosa is quite rugated, and extensive folds are
present, but even so, compared to the upper end of the mammalian
reproductive tract, it's very open. This is to be expected in light
of the size of the egg it has to carry.
As with mammals,
fertilization of the egg takes place in the oviduct, usually by sperm
that have been stored in the lower end of the tract and squeezed out
by the passage of an egg. They then swim up the tract and meet the
oncoming next egg. Contractions of the muscular oviduct and body
movements help shove the egg along.
