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How the Human Body Fits Together, a free science course on Tomo

How the Human Body Fits Together

Understand your body's structural architecture through the bones, muscles, and organs you live with every day. Map where parts actually sit and see how your internal systems coordinate every breath and step.

Like Duolingo, but for How the Human Body Fits Together. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.

A short one: 12 levels across 2 sections, about 24 minutes end to end, roughly 5 days at five minutes a day. It moves through The Moving Framework and The Internal Systems. It starts from scratch.

12 bite-size levelsAbout 5 minutes each

Free forever · No credit card · iPhone & Android

Barnaby the Bear, the guide who teaches the How the Human Body Fits Together course
How the Human Body Fits Together
with Barnaby the Bear
12
Levels
2
Sections
5
Min/day
What you'll learn

Key ideas in How the Human Body Fits Together

  • Certain bones sit directly beneath the skin without thick muscle cover, making them easily felt
  • Bones act as lever arms while the joints between them serve as fulcrums
  • Body levers prioritize speed and distance over heavy lifting leverage
  • A muscle anchored close to a joint needs to shorten only a tiny distance to swing the limb through a wide arc
  • The collarbone (clavicle) spans the top of the chest to anchor the shoulder
  • The hip crest marks where the torso ends and the pelvic basin begins
  • The bony elbow point (olecranon) serves as the primary hinge marker for the arm
  • Ball-and-socket joints like the shoulder and hip allow rotation in almost every direction
  • Hinge joints like the elbow and knee lock movement into a single plane to provide stability
  • Greater mobility in a joint inherently increases the risk of slipping out of place
  • Bone is living tissue with blood vessels and active cells
  • Impact and weight-bearing exercise stimulate bones to lay down extra mineral density where stress is highest
  • Inactivity causes bone tissue to gradually thin and weaken
  • Slick cartilage caps cushion the ends of touching bones so hard surfaces never collide
  • Synovial fluid acts like biological oil inside the sealed joint capsule to eliminate friction
  • Wear or loss of this protective cartilage layer leads to painful bone-on-bone friction
Why not just Google it

You've tried the other tabs

Wikipedia

Thirty open tabs. Four facts you actually kept.

YouTube

You watched. You nodded. By Sunday it was gone.

ChatGPT

One answer, then back to scrolling.

Online courses

Eight weeks. You meant to finish. You didn't.

Tomo gives How the Human Body Fits Together the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.

Try a question

Here's what playing it feels like

A real question from this course. Take your best guess.

Bony Levers and Body Landmarks

When your body moves, how do your bones and joints work together?

Get it right to open this lesson and 11 more in the app.

Course map

Where How the Human Body Fits Together takes you

  1. 1

    The Moving Framework

    • Locating Your Structural Landmarks
    • Cables and Opposing Tension
  2. 2

    The Internal Systems

    • Pipes, Pumps, and Pressure
    • The Core Floorplan

2 sections · 4 units · 12 levels. Built to play, not to enroll.

New

Tomo is in ChatGPT

Tomo is also a ChatGPT plugin: the same playable courses, built and played inside your chat.

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How it's taught

You pick the voice

This course
Explain Like I'm 5

How the Human Body Fits Together is taught in the Explain Like I'm 5 style: no big words. promise.. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.

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Download Tomo, search How the Human Body Fits Together, and play your first lesson in under a minute.