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Physical facts & stats

7 fact-checked facts about the human body and physical fitness, each with the reason behind it. 5 more are in today's round and join this page after it closes.

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The basics

How many bones are in a typical adult human body?

Answer206

An adult skeleton usually has 206 bones; babies are born with more that later fuse together.

What connects muscles to bones?

AnswerTendons

Tendons are tough cords that transfer the pull of muscles to bones.

Going deeper

What is the longest bone in the human body?

AnswerThe femur

The femur, or thigh bone, is the body's longest and strongest bone.

What connects bones to other bones at a joint?

AnswerLigaments

Ligaments are bands of tissue that hold bones together and stabilise joints.

Which molecule do cells use as their immediate energy source?

AnswerATP

Adenosine triphosphate (ATP) releases energy for muscle contraction and other cell work.

Expert level

What are the three types of muscle tissue?

AnswerSkeletal, cardiac and smooth

Skeletal muscle moves bones, cardiac muscle forms the heart and smooth muscle lines organs.

Which muscle is generally considered the largest in the human body?

AnswerGluteus maximus

The gluteus maximus in the buttocks is the body's largest muscle, used in standing up and climbing.

Know these cold?Today's round is five questions like these, 20 seconds each. Your streak and level follow you to every arena.Play today's round