This page is about a plant structure. For animals and humans, see Ovum
Location of ovules inside a Helleborus foetidus
Ovules produce the female reproductive cells which get fertilized during sexual reproduction in seed plants. The word literally means "small egg".
The megagametophyte (also called the embryo sac in flowering plants) is inside the ovule. The megagametophyte produces the egg cell.
Ovule structure (anatropous) 1: nucleus 2: chalaza 3: funiculus 4: raphe
Models of different ovules, Botanical Museum Greifswald
Megagametophyte formation of the genera Polygonum and Lilium. Triploid nuclei are shown as ellipses with three white dots. The first three columns show the meiosis of the megaspore, followed by 1-2 mitoses.