Why Do We Have 5 Fingers On Each Hand and 5 Toes On Each Foot?

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Why Do We Have 5 Fingers On Each Hand and 5 Toes On Each Foot?

In this week’s Ask A Doer Dr. Richard explores Inigo’s question: Why do we have 5 fingers on each hand and 5 toes on each foot? Jumping into human evolution, we will find why we didn’t evolve to have 2 fingers or even 8 fingers on each hand!

Terms You’ve Learned: 

Vertebrate – A vertebrate is an animal with a backbone. Fishes, amphibians, reptiles, birds, and mammals, including humans, are all vertebrates.

Digits – A finger, thumb, or toe of land vertebrates.

Primate – Primates are a type of mammal with forward-facing eyes, grasping hands and feet, and a large brain. Over 200 types live on Earth today, including humans!

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