Lesson 31 of 54 in this sequence

57%

Not completed yet

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

Learning path

Step 31 of 54

Continue the 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 31/54
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

Teamwork Inside You: How Body Systems Work Together · Organ systems depend on and cooperate with one another to keep the whole body alive and active. · NGSS MS-LS1-3

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: 4 items, 4 answer keys, 4 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: Complete or review Skin Is a Barrier That Keeps Germs Out; 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 kids 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/kids/anatomy_physiology/en/lesson/systems-working-together
Route source: Fallback route needs owner canonical review
Candidate route: /library/kids/anatomy_physiology/en/lesson/systems-working-together

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

Teamwork Inside You: How Body Systems Work Together

with Atlas

Atlas the friendly guide stands beside a giant see-through body model, pointing at lungs, heart, and digestive tract connected by moving paths of air, blood, and food energy.

Name at least three body systems and describe what each one does.
Explain how two systems pass something useful to each other.
Identify why one system cannot keep the body alive alone.
Predict what happens to the whole body when one system stops working.

Key terms

body system: a group of organs sharing one job
respiratory system: the nose and lungs that grab oxygen
circulatory system: the heart and blood that carry things
digestive system: the parts that turn food into energy
teamwork: working together to get a job done

Everyone Has a Job

Your body is like a team where every player has a job, and no one wins alone. Your respiratory system, your nose and lungs, pulls in air to grab oxygen. But oxygen has to travel somewhere. So your circulatory system, your heart and blood, carries that oxygen to every part of you. Each system has its own special job to do for the team.

Passing the Ball

The systems help each other by passing useful things along. Your digestive system breaks food into tiny bits of energy. Then your blood delivers that energy too, just like it delivers oxygen. Your muscles and brain use it all to run, think, and play. If one teammate quits, the others cannot finish the job, so all your systems cooperate every second.

Worked examples

How do two systems work together with oxygen?

The respiratory system pulls in oxygen from the air.
The lungs pass the oxygen into the blood.
The circulatory system carries the oxygen to every cell.

Answer: The lungs grab oxygen and the blood carries it everywhere.

Hi, I'm Atlas! Your body is like a busy team where every player has a job, and no one wins alone. Your respiratory system — your nose and lungs — pulls in air to grab oxygen. But oxygen has to travel, so your circulatory system — your heart and blood — carries that oxygen to every part of you. Meanwhile, your digestive system — your mouth, stomach, and intestines — breaks food into tiny bits of energy, and guess who delivers that energy too? The blood again! See the teamwork? Your lungs get the oxygen, your heart and blood move it, your digestive system makes the fuel starting in your mouth all the way through your intestines, and your muscles and brain use it all to run, think, and play. If one teammate quits, the others can't finish the job. That's why all your systems cooperate every single second, even while you sleep. Working together keeps the whole you alive and active! If you ever feel stuck, look back at the teamwork picture and trace what oxygen does first — follow its path from the lungs to the blood to the rest of the body, and the answer will become clear.

Activity

Match each body system to the job it does for the team.

Practice

Name three body systems and one job each does.

Which system carries oxygen from your lungs everywhere?

Common mistakes to avoid

Each system works all aloneBody systems pass useful things and depend on each other.
Lungs make their own oxygenLungs collect oxygen from air; the blood must carry it.

Check your understanding

Your lungs take in oxygen. Which system carries that oxygen to the rest of your body?

Why can't the respiratory system keep you alive all by itself?

A common idea is that each body system does its own separate job, one after another, and never needs the others at the same time. Why is that idea wrong?

What would likely happen to the whole body if the heart suddenly stopped moving blood?

Recap

Your body systems work as a team. The respiratory system grabs oxygen, the circulatory system carries it, and the digestive system makes energy. They pass useful things to each other every single second.

Reflect

Picture your systems passing the ball to keep you alive!