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Your skin is an organ that helps prevent dehydration.

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Title Skin: Epidermis and Dermis Description Line drawing showing cross-section of dermal and epidermal skin layers. Topics/Categories Anatomy -- Skin Type B&W, Medical Illustration Source National Cancer Institute
Human Body

Largest organ

Your skin is an organ that helps prevent dehydration.

Skin is the body's largest organ and an important barrier against water loss. It also helps regulate temperature, detect touch, and defend the body against harmful substances and microbes.

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Human Skeleton on Exhibit at The Museum of Osteology, Oklahoma City, Oklahoma.
Human Body

300

Babies are born with about 300 bones, but adults have only 206.

Babies have more separate skeletal pieces than adults, often described as about 300 bones compared with the usual adult count of 206. The newborn number is approximate because developing bone and cartilage are not always counted the same way.

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Human Body

1 cm

You are about a centimeter taller in the morning than at night.

People are usually slightly taller after a night lying down because spinal discs regain fluid when unloaded. Around a centimeter is a useful rough illustration, not a fixed daily change for everyone.

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