Lesson 1 of 8 in this sequence

13%

Not completed yet

Saved on this device only — not synced to an account yet.

Learning path

Step 1 of 8

Start of sequence

ResumeReturn to this step ReviewRevisit the core idea RemediateGet repair practice Next stepChoose the next lesson manually

Completion

Review objectives and instruction
Complete the activity with manual learner confirmation
Answer every understanding-check item
Show completion feedback and reward only after the learner finishes the check

Progress

Step 1/8
15 content types
AI help source context available
Auto-advance blocked

Review objectives and instruction

AI help

Available only with source grounding, privacy limits, age controls, and measurement.

AI source context

Body Parts and the Jobs They Do · Your Amazing Body · body parts · heart

Evidence: local lesson AI-help metadata only; source-grounding, privacy, age-safety, and measurement hooks do not prove real model quality, production telemetry, child AI approval, or AI tutor production readiness

Production AI readiness not claimed

AI source context

Assessment shape

Local lesson assessment shape is complete.

Local shape only; production answer-attempt telemetry, live ownership/RLS evidence, mastery interpretation, release, and production readiness are not claimed here.

Objectives: 4
Activity: Prompt ready
Quiz items: 3 items, 3 answer keys, 3 explanations
Reward: Completion reward ready

Assessment progress stays manual: do not auto-advance through uncertain answers, failed writes, consent, media, payment, learner choice, or AI-assisted checks.

Learning-loop evidence: Content-map contract only; persistence and production learner-progress writes require route/API evidence.

Manual policy: assessment, media, consent, payment, learner choice, failed writes, and AI-uncertain help stay under learner control.

Prerequisite: Use with parent or guardian controls for child learners

AI guardrails

Privacy

Do not send raw child free text without consent
Use source excerpts and non-identifying progress state only
Asset is not registry-gated

Age safety

Apply junior audience controls before AI-help claims
Keep child learner AI paths behind guardian/product review evidence before readiness claims

Measurement

Log AI help usage by surface and asset slug
Evaluate answer quality against source-grounded rubric before production-readiness claims
Tie remediation prompts to completion, retry, or review outcomes

Local AI-help guardrails only; they do not prove guardian approval, production telemetry, model evaluation, release, deployment, or AI tutor production readiness.

Source and rights

Source path: koydo-app/scripts/curriculum-authoring
License: ai-generated-koydo
Attribution: Attribution decision needs owner review
AI provenance: claude-opus-4-8

Source review gates: attribution_missing

Local source evidence only; this does not prove publication rights, attribution approval, AI provenance clearance, release, deployment, or production readiness.

Route review

Current route: /library/junior/medicine_clinical/en/lesson/body-parts-and-jobs
Route source: Fallback route needs owner canonical review
Candidate route: /library/junior/medicine_clinical/en/lesson/body-parts-and-jobs

Local route evidence only; fallback candidates need owner-approved canonical route policy before route writes, production discoverability, or readiness claims.

Content gates: canonical_target_web_missing_uses_library_fallback

lessonslessonslesson objectivesmedia scenesdrillspractice setsquizzesfeedbackcharacterscitationsconcept mapsprogressresumereviewremediationnext steps

Body Parts and the Jobs They Do

with Medi

A bright doctor's office with a colorful poster of the human body on the wall. Medi the friendly medic bear points cheerfully at the poster, tracing a glowing path through all five highlighted organs — brain, heart, lungs, stomach, and bones — wearing a tiny stethoscope and grinning with excitement.

Identify five major body parts: heart, lungs, stomach, brain, and bones.
Explain one simple job that each major body part does.
Match each body part to a picture of what it helps you do.
Compare body parts to everyday tools that do similar jobs.

Key terms

organ: A body part that does a special job, like your heart or your lungs.
blood: The red liquid your heart pumps to carry oxygen and food to every part of you.
oxygen: A gas in the air your body needs to stay alive and full of energy.
skeleton: All of your bones together, forming the strong frame that holds your body up.

Parts That Work as a Team

Your body parts never work alone — they help each other all day long. When you run, your brain decides to move, your bones and muscles carry you forward, your lungs grab extra air, and your heart pumps faster to deliver that oxygen everywhere. No single part could keep you going by itself. Working together is what keeps you healthy and strong.

Comparing Body Parts to Tools

It can help to picture each organ as a tool you already know. Your heart is like a water pump that never turns off. Your lungs are like balloons that fill and empty. Your stomach is like a mixing bowl that mashes food. Your bones are like the frame of a house. These pictures help you remember the real job each part quietly does inside you.

Worked examples

How does air help your whole body when you breathe?

You breathe in air, and your lungs fill up like balloons.
Your lungs take the oxygen out of the air and pass it into your blood.
Your heart pumps that oxygen-filled blood to every part of your body.

Answer: Your lungs catch the oxygen and your heart delivers it everywhere, so the two organs team up to keep you going.

Hi, I am Medi! Your body is full of amazing parts — and every part has a job to do. Your BRAIN is like the boss. It tells the rest of your body what to do. It helps you think, dream, and remember your favorite song. Your HEART is like a pump. It squeezes all day and all night to push blood around your body. Put your hand on your chest — can you feel it beating? Your LUNGS are like balloons inside your chest. When you breathe in, they fill up with air. When you breathe out, they get smaller. They take the oxygen from the air and pass it into your blood. Your STOMACH is like a mixing bowl. When you eat food, your stomach squishes and squeezes it to break it into smaller pieces so your body can keep working on them. Your BONES are like a strong frame. They hold you up so you do not fall over like a floppy noodle! They also protect the soft parts inside you. Every part has one job — and they all work together to keep you going! Look back at what each part does — that will help you make your matches in the activity!

Activity

Drag each body part to the picture that shows its job.

Practice

Name one body part and describe the main job it does.

Explain how your heart and lungs work together when you run.

Common mistakes to avoid

The brain pumps blood around your body.The heart pumps blood; the brain is the boss that thinks and sends messages.
When you breathe, the whole breath goes into your blood.Only the oxygen from the air crosses into your blood, not the entire breath.

Check your understanding

What does your heart do?

Your lungs fill up when you breathe in. What do lungs pass into your blood?

Sam thinks the brain pumps blood around the body. Is Sam right?

Recap

Your body has many parts, and each one has a special job. The brain thinks and gives orders, the heart pumps blood, the lungs take in oxygen, the stomach breaks down food, and bones hold you up. Best of all, they work together as one amazing team.

Reflect

Which body part surprised you the most, and why?