What reproductive structure in a female mammal that produces sex cells/10652656/660a651d? utm_source=registration

The ovaries. The female gonads produce an ovum in every menstrual cycle. The ova travels down the fallopian tube where if fertilized by a sperm, becomes a zygote and implants in the uterus.  The luteinizing hormone produced by the pituitary gland stimulates the release of ova from the ovaries.

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.