Examlex
Whooping cough is transmitted via respiratory droplets.The___stage lasts 1-2 weeks, while the second stage________is when a person has severe coughing.
Ectoderm
The outermost layer of cells or tissue of an embryo in early development, giving rise to the epidermis and nervous system among others.
Germ Layer
One of the three primary layers of cells (ectoderm, mesoderm, endoderm) in the early embryo that develop into specific organ systems.
Nervous System
A complex network of nerve cells and fibers that transmits nerve impulses between parts of the body, coordinating and controlling bodily functions.
Ectoderm
The outermost layer of cells in the developing embryo of an animal, giving rise to the skin and nervous system.
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