Some might say it looks like a finger. Others might see a worm. Scientists in the field often liken it to an antenna. The technical name is primary cilium. This slender, microscopic appendage juts out from the surface of most cells in the human body—and yet for many years, it was completely missing from textbook illustrations.



Summary

The primary cilium, a microscopic, finger-like or antenna-like appendage found on most human cells, was surprisingly omitted from textbooks for many years. Despite its widespread presence, its significance was often overlooked. While scientists have various ways of describing its appearance, its crucial role in cellular function is now being recognized, prompting renewed research and a deeper understanding of its impact on human health.

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