IPA: //ˈhaɪpəˌblæst//
KK: /haɪˈpɒblæst/
A layer of cells in an embryo that develops into the innermost layer of tissue, which eventually forms organs such as the digestive system.
During early development, the hypoblast plays a crucial role in forming the endoderm layer of the embryo.
Hypoblast → It is formed from "hypo-" (meaning under or below) and "blast" (from Greek "blastos", meaning germ or bud). The word refers to the layer of cells that is located beneath the epiblast in the early embryo, hence the meaning of being under the blastoderm.
Think of 'hypo-' meaning 'under' and 'blast' referring to a 'germ' or 'bud' — this helps you remember that a hypoblast is a layer of cells located beneath the main embryonic layer.