Bigger normal speed |
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Smaller normal speed |
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NON- |
This is the head of a silkworm, close-up. It is not a worm but a larva, the caterpillar stage of a moth. The silk from the silkworm's cocoon is a single, continuous thread. It is made of a protein that is secreted from two salivary glands in the caterpillar's head. |