A Wonderleaf question

a real page from the book
A cut turns into a scab when platelets in the blood gather at the broken skin and help form a clot. A protein called fibrin makes a net that traps blood cells, and the clot dries into a firm cover.
Under that cover, the real repair keeps going. Skin cells spread from the edges, new tiny vessels grow, and white blood cells help handle germs. When the new skin is ready, the scab loosens and falls away.
Wash hands, inspect an old healed mark, and talk through what the skin probably repaired underneath.
Watercolour scenes, straight answers, about three minutes cover to cover.
Open the picture bookOne more wonder: Why is space so dark?
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