Examlex
Identify the earliest and latest age that would be in the normal range for a child's first word appearance.
Germ Layers
The three primary layers of cells (ectoderm, mesoderm, and endoderm) in the early embryo from which all tissues and organs develop.
Ectoderm
The outermost layer of cells or tissue of an embryo in early development, giving rise to the skin and nervous system.
Nervous Tissue
Comprised of neurons and supporting cells, this tissue is central to the control of bodily functions and the processing of information.
Expulsion Stage
The final stage of childbirth in which the baby is delivered from the womb through the birth canal to the outside world.
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