The female gametophyte in seed plants, located within the ovule, where fertilization occurs to form the embryo.

A cluster of cells in the early embryo that will develop into the tissues of the body.

The branch of biology that studies the development of embryos from fertilization to birth or hatching.

Relating to an embryo, the early stage of an organism’s development.

Pluripotent cells derived from the early embryo that have the potential to develop into any cell type in the body.

The structures in a plant’s ovule that are involved in fertilization, including the egg cell and surrounding cells.

A specialized structure on the heads of some animal embryos, used to break open the egg during hatching.

A term referring to something that has an oval or elliptical shape.

The expulsion of semen from the male reproductive system, typically during sexual intercourse.

A protein found in connective tissues that provides elasticity, allowing tissues to stretch and return to their original shape.