How Human Diseases Work
Explore how the human body breaks down across major medical specialties, from heart attacks and strokes to auto-immunity and cancer. Learn the biological mechanisms behind common symptoms and how modern medicine diagnoses and fights back.
Like Duolingo, but for How Human Diseases Work. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
24 levels across 3 sections, about 48 minutes end to end, roughly 10 days at five minutes a day. It moves through Reading Alarms and Vital Organ Failures; Regulatory and Nervous System Breakdowns; and Immune Wars, Cancer, and Clinical Logic. It starts from scratch.
Free forever · No credit card · iPhone & Android
Key ideas in How Human Diseases Work
- A symptom is a personal, internal experience that only the patient can feel and report
- A sign is an objective abnormality that an examiner can directly observe, measure, or test
- Clinical diagnosis starts by combining subjective symptoms with verifiable physical signs
- Acute inflammation causes local blood vessels to dilate, surging warm arterial blood to the infected tissue and causing redness and heat
- Capillaries become permeable and leak protein-rich fluid into the surrounding space, which creates swelling
- Swelling and released chemical messengers stimulate nearby nerve endings, causing pain
- A fever is an intentional response driven by the brain's hypothalamus raising its internal temperature set point
- Higher body temperatures help slow the replication of many bacteria and viruses while boosting immune cell efficiency
- Chills and shivering often occur at the start of a fever because the body feels cold relative to the new, higher set point
- Visceral pain from internal organs is dull, crampy, and poorly localized because internal organs have fewer sensory receptors
- Somatic pain from skin, muscles, and body wall linings is sharp and easily pinpointed due to dense nerve distribution
- Pain from an inflamed organ often shifts from diffuse visceral aching to sharp somatic pain once the surrounding abdominal wall lining becomes irritated
- Malaise and fatigue are coordinated physiological responses triggered by immune chemical messengers acting on the brain
- Mounting an immune defense requires massive amounts of metabolic energy, which resting conserves
- Feeling sick enforces behavioral rest, keeping the organism safe and prioritizing recovery over foraging or exercise
- Lipids penetrate injured inner lining layers of arterial walls
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 How Human Diseases Work 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.
Which of these is a medical sign rather than a symptom?
Get it right to open this lesson and 23 more in the app.
How to learn How Human Diseases Work, step by step
Go in order. 24 short levels across 3 sections, about 48 minutes in all, five minutes a day.
- 1
Reading Alarms and Vital Organ Failures
- Decoding Symptoms: How the Body Sounds the Alarm
- Cardiovascular Failures: Pump and Pipe Breakdowns
- Respiratory Distress: Compromised Gas Exchange
- 2
Regulatory and Nervous System Breakdowns
- Metabolic and Filter Collapse: Diabetes, Kidneys, and Liver
- Neurological and Psychiatric Pathologies: Circuit Failures
- 3
Immune Wars, Cancer, and Clinical Logic
- Infectious Threats and Immune Malfunctions
- Oncology: Cellular Rebellion and Tumor Biology
- Clinical Problem-Solving: Diagnosis and Therapeutics
3 sections · 8 units · 24 levels. Built to play, not to enroll.
Questions about How Human Diseases Work
How do I learn How Human Diseases Work?
Go in order: start with Reading Alarms and Vital Organ Failures, then Regulatory and Nervous System Breakdowns, then Immune Wars, Cancer, and Clinical Logic. On Tomo that's 24 short levels, about 48 minutes in all, played five minutes a day. Start free and play the first level in under a minute.
Is there a Duolingo-style app for How Human Diseases Work?
Yes. Tomo works like Duolingo: short daily lessons, streaks and quick quizzes. How Human Diseases Work is one of its free courses, and you can type any other topic to get a course of your own.
Is the How Human Diseases Work course free?
Yes. How Human Diseases Work is playable on Tomo's free plan, which doesn't expire. No credit card, no waitlist. Download the app and start your first lesson.
How long does it take to learn How Human Diseases Work?
24 levels across 3 sections, about 48 minutes of play in total. It's built for five minutes a day, so you finish it a little at a time instead of all at once.
Do I need any background to start How Human Diseases Work?
No. It's pitched at a beginner level, so it starts where you are and builds up. If you can tap a phone, you can start.
Tomo is in ChatGPT
Tomo is also a ChatGPT plugin: the same playable courses, built and played inside your chat.
Add Tomo to ChatGPT- What to ask
- “Make me a Tomo course on black holes.” “Turn this chat into a Tomo course.”
- What you get
- Quick questions with instant feedback, hearts and stars, ready to play in about a minute.
- Where it goes
- No sign-up to start. Connect your Tomo account and your streak carries on in the app.
You pick the voice
How Human Diseases Work is taught in 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.
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Start How Human Diseases Work today.
Download Tomo, search How Human Diseases Work, and play your first lesson in under a minute.