1. the inner layer of cells in an early embryo that gives rise to the endoderm
Usage: biology; embryology

Examples

• The hypoblasts form the lower layer of the bilaminar embryonic disc.
• During gastrulation, the hypoblasts contribute to the formation of the yolk sac.
• Researchers studied the migration patterns of hypoblasts in developing embryos.
• The hypoblasts eventually differentiate into various internal organs.
• In mammalian development, hypoblasts play a crucial role in early cell organization.