The Secret Life of Cells
Like Duolingo, but for The Secret Life of Cells. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
A deep dive: 40 levels across 5 sections, about 80 minutes end to end, roughly 16 days at five minutes a day. It moves through The Living City, The Border and the Interior, Energy and Manufacturing, The Command Center, and Life Cycles and Communication. It starts from scratch.
Free forever · No credit card · iPhone & Android
Key ideas in The Secret Life of Cells
- The cell as the fundamental unit of life
- The relationship between single-celled and multicellular life
- The fundamental unit of life
- Cells are constantly active, not static or 'still' inside
- The nucleus stores the genetic instructions for the cell
- Thousands of different chemical reactions occur at the same time in a tiny space
- Mitochondria convert nutrients into usable energy
- The membrane controls what enters and exits the cell
- Constant motion and reaction are required to keep the cell from breaking down
- Organelle functions using the city analogy
- The dynamic nature of cellular chemistry
- Life isn't a special ingredient, but a result of how molecules interact
- Individual molecules follow the laws of chemistry, but the whole system follows the laws of biology
- Organization is the key difference between a living cell and a bowl of biological soup
- Life as an emergent property of molecular organization
- Visible light has a physical width (wavelength)
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives The Secret Life of Cells 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.
Here's what playing it feels like
A real question from this course. Take your best guess.
What is true about all living things, regardless of their physical size?
Get it right to open this lesson and 39 more in the app.
Where The Secret Life of Cells takes you
Explore the microscopic world within you, where tiny biological machines work tirelessly to keep you alive. Learn how cells build, power, and repair themselves in this comprehensive guide to the building blocks of life.
- 1
The Living City
- The Cell as a Microscopic Machine
- Seeing the Invisible
- 2
The Border and the Interior
- The Plasma Membrane: The Smart Gatekeeper
- The Cytoskeleton: Scaffolding and Highways
- The Cytosol: The Crowded Soup of Life
- 3
Energy and Manufacturing
- Mitochondria: Converting Fuel to Energy
- The Protein Factory: Ribosomes and the ER
- The Golgi Apparatus: Packaging and Shipping
- 4
The Command Center
- The Nucleus: The Master Library
- DNA and RNA: The Blueprints of Life
- 5
Life Cycles and Communication
- Cell Division: How One Becomes Two
- Cell Signaling: How Cells Talk
- Specialization and Death
5 sections · 13 units · 40 levels. Built to play, not to enroll.
You pick the voice
The Secret Life of Cells is taught in the The Professor style: clear, structured, thorough. 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.
More Science on Tomo
How Living Things Work
Explore the clever engineering behind all life on Earth. Learn how cells build order, how food turns into movement, and how nature edits its own recipes across generations.
Biology: The Logic of Life
Move beyond memorizing parts to understanding the systems that drive all living things. Explore how energy, information, and environment interact to create the complexity of the natural world.
Bioengineering in the Real World
Discover how we bridge the gap between biology and machines to repair bodies, grow food, and design the future of medicine.
The Body's Blueprint
Discover how your body is built to move, protect itself, and keep you alive. This course turns the complex world of anatomy into a simple map of your own physical machinery.
Forces, Chemistry, and Living Circuits
Discover how the universe operates across physical forces, chemical bonds, living cells, and silicon circuits. Learn the fundamental principles that connect energy, matter, and electronic signals in our everyday world.
The Machinery of Life
Move beyond basic definitions to understand the chemical engines, genetic circuits, and complex systems that drive every living thing on Earth.
Start The Secret Life of Cells today.
Download Tomo, search The Secret Life of Cells, and play your first lesson in under a minute.