Human Body Manual 中文 Get the app

iPhone · iPadChinese & EnglishWorks offline

The Human Body:
An Owner's Manual

人体使用手册

How many times does your heart beat in a day? Why does your eye have a blind spot? Should you worry about the arrows on your checkup report?
A popular-science book that runs from cells to first aid, made into an app you can read, listen to and try out with your own hands.

Free on the App Store Read a page

Free to download — read the preface, Part 1 and the red-flags chapter in full · one purchase unlocks the whole book · no ads, no account. The app's interface is in Simplified Chinese; the book is fully bilingual, with an English-only reading mode.

Home screen body map: tap the heart to open Chapter 14
  • 35chapters章
  • 281figures幅图
  • 17hands-on labs个互动实验
  • 56disease cards种疾病图鉴
  • 401quiz questions道章末自测
  • 707flashcards张术语卡

Every paragraph in Chinese and English每一段，都有中文和英文

Eight parts and 35 chapters, side by side paragraph by paragraph. Read both languages together, or switch to Chinese-only or English-only — in single-language mode, tap any paragraph to see its translation. Learn how your body works and pick up medical vocabulary along the way.

  • 281 figures — zoom in full screen, with numbered labels and keys
  • Tap a term for its definition; a 666-entry Chinese–English glossary
  • Read-aloud in Chinese and English, highlighting each paragraph as it goes
  • Book-style typesetting, adjustable text size, dark mode
Reader: Chapter 14 in parallel Chinese and English
Full-screen figure: the heart in section, with numbered labels

Learn it by doing it动手试一次，比读十遍记得牢

17 interactive labs, each linked back to the text: drag the heart rate and watch the ECG respond, follow a red blood cell around both circuits, close one eye and find your own blind spot.

  • A tappable body map: 16 regions, each opening its chapter
  • 56 common diseases: causes, mechanism chains, symptoms, diagnosis, treatment and prevention, and when to get care
  • Time your reactions, sweep your hearing range, work a Punnett square
Lab: heartbeat and ECG
Disease card: hypertension

Quiz yourself, then review days later读完考一考，隔几天再复习

Every chapter ends with a quiz, and the questions you miss come back; term flashcards are scheduled with spaced repetition so they stick.

  • 401 end-of-chapter questions — retry the ones you missed
  • 707 term flashcards with spaced repetition
  • Label quizzes: hide a figure's labels and test yourself
  • A progress heat map and study streaks
End-of-chapter quiz
Study progress

A page from the book先读一段

A section from Chapter 14. In the app, figures open full screen and the red terms show their definitions when tapped.

Chapter 14 · The Heart and Circulation第 14 章

14.2Four chambers, two circuits四个腔、两条路

Heart in coronal section: four chambers1234567
  1. 1Right atrium 右心房
  2. 2Right ventricle 右心室
  3. 3Left atrium 左心房
  4. 4Left ventricle 左心室
  5. 5Septum 室间隔
  6. 6Aorta 主动脉
  7. 7Superior vena cava 上腔静脉
Heart in coronal section: four chambers 心脏冠状切面：四个腔

心脏分左右两半，中间有隔膜（septum）隔开，左右的血不相混。每一半上面是心房（atrium），负责收血；下面是心室（ventricle），负责往外泵。

The heart has left and right halves, separated by the septum so their blood does not mix. Each half has an upper atrium that receives blood and a lower ventricle that pumps it out.

血流一圈要过心脏两次。右心把全身回来的缺氧血送进肺，叫肺循环（pulmonary circulation）；左心把肺里回来的富氧血送往全身，叫体循环（systemic circulation）。

Blood passes through the heart twice per lap. The right heart sends oxygen-poor blood from the body to the lungs (pulmonary circulation); the left heart sends oxygen-rich blood from the lungs to the body (systemic circulation).

First-aid content is always free

Know what to do when it matters关键时刻，知道该做什么

Chapter 35, “Red Flags: When to Seek Care”, is free in full: which symptoms mean calling emergency services now, and which mean going to a hospital today. Two first-aid labs are always free too — spot a stroke with the six BE FAST steps, and practise CPR compressions to a beat of 100–120 per minute.

This is a popular-science book, not medical advice, and it can't be used for diagnosis or treatment. If you feel unwell, see a doctor.

Red-flags reference

Contents目录

From molecules and cells to the brain and heart, then sleep, nutrition, checkups and first aid. Every chapter opens with a “why it matters” scene, covers structure and function, and ends with “use & maintenance” notes and references.

Before you start

Before You Start开始之前

  1. Pre.How to Read This BookFree

Part 1

Foundations地基：从分子到组织

  1. 1Levels of OrganizationFree
  2. 2The CellFree
  3. 3The Four Tissue TypesFree
  4. 4Genetics BasicsFree
  5. Int.Five Ways the Body Goes WrongFree

Part 2

Support and Movement支撑与运动

  1. 5The Skeletal SystemPreview
  2. 6Muscles and JointsPreview

Part 3

Control Systems控制中心

  1. 7The BrainPreview
  2. 8Spinal Cord, Peripheral and Autonomic NervesPreview
  3. 9VisionPreview
  4. 10Hearing and BalancePreview
  5. 11Smell, Taste, Touch and PainPreview
  6. 12The Endocrine SystemPreview

Part 4

Transport and Defense运输与防御

  1. 13BloodPreview
  2. 14The Heart and CirculationPreview
  3. 15The Lymphatic and Immune SystemsPreview

Part 5

Exchange and Boundaries交换与边界

  1. 16The Respiratory SystemPreview
  2. 17The Digestive TractPreview
  3. 18Liver, Gallbladder and PancreasPreview
  4. 19The Urinary System and Fluid BalancePreview
  5. 20Skin, Hair and NailsPreview

Part 6

The Life Cycle生命周期

  1. 21The Male Reproductive SystemPreview
  2. 22The Female Reproductive SystemPreview
  3. 23Fertilization and DevelopmentPreview
  4. 24Growth, Puberty and AgingPreview

Part 7

The Whole System整机运行

  1. 25MetabolismPreview
  2. 26Homeostasis and ThermoregulationPreview
  3. 27Sleep and Circadian RhythmsPreview
  4. 28The MicrobiomePreview
  5. 29The Stress ResponsePreview

Part 8

Operating and Maintaining使用与保养

  1. 30Sleep: What the Evidence SupportsPreview
  2. 31NutritionPreview
  3. 32ExercisePreview
  4. 33Stress, Mood and Getting HelpPreview
  5. 34Reading a Checkup ReportPreview
  6. 35Red Flags: When to Seek CareFree

Appendices

Appendices附录

  1. AChinese–English GlossaryFree
  2. BReferences and Further ReadingFree

Start free, buy once先读，再决定

The download is free. If you like it, buy the whole book once — it's not a subscription and never renews.

Free sample

$0Start reading right after you download — no account

  • Preface: “How to Read This Book”
  • Part 1, “Foundations”: all 5 chapters
  • Chapter 35: “Red Flags: When to Seek Care”
  • Appendices: Chinese–English Glossary, References and Further Reading
  • The other 30 chapters: the opening and first section of each
  • 5 labs: Punnett Square, Reaction Time, Find Your Blind Spot, Spot a Stroke: BE FAST, CPR Rhythm
  • 3 sample diseases: Stroke, Hypertension, Type 2 diabetes

Full Book

$4.99One-time purchase, not a subscription · local prices as shown in the App Store

  • The whole book: preface, 35 chapters, interlude and two appendices
  • All 17 interactive labs
  • All 56 disease cards
  • All 401 quiz questions and 707 flashcards
  • Family Sharing; buy once for both iPhone and iPad
  • Restore Purchases on a new device — you won't be charged again

Always free: the glossary, red-flags reference, full-text search, bookmarks / highlights / notes, progress tracking, backup and iCloud sync — and read-aloud for everything you can read.

Questions常见问题

What do I need?

An iPhone or iPad running iOS / iPadOS 26 or later. The app's interface is in Simplified Chinese; the book text is in Chinese and English, with an English-only reading mode.

Do I need to be online or sign up?

No. Everything is inside the app and works offline, with no ads. Your progress, bookmarks and notes stay on your device and in your own iCloud — we can't see them, and we collect no data.

Can this replace seeing a doctor?

No. It's a popular-science book, not medical advice, diagnosis or treatment. Its numbers and conclusions come from published authoritative sources, with references at the end of each chapter and in Appendix B; AI-generated illustrations are labeled in their captions.

I got a new phone. Do I keep the Full Book?

Yes. Sign in with the same Apple ID and tap Settings → 完整版 (Full Book) → 恢复购买 (Restore Purchases). Members of your Family Sharing group can use it too.

More answers on the support page, or email dongxiyunei@gmail.com

Human Body Manual app icon

Your body's manual, in your pocket把这本书装进口袋

Free on the App Store