gonads

No young Cave Swallows were taken and gonads of adults were in various stages of reproductive activity.

The contents of the gonads drop into the central cavity and pass out through the mouth.

Four egg-sacs, or gonads, are conspicuous in horseshoe shape around the center of the disk.

The writer has recently examined the gonads of a ten months old parthenogenetic frog.

By hermaphroditism is meant the existence of complete and separate sets of female and male gonads in the same individual.