Lesson 27 of 54 in this sequence

50%

Not completed yet

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

Learning path

Step 27 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 27/54
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

Organs Team Up Into Body Systems · Systems That Work Together · body systems · organs

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: 5
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: Complete or review Major Muscle Groups; 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/organs-work-together-as-systems
Route source: Fallback route needs owner canonical review
Candidate route: /library/kids/anatomy_physiology/en/lesson/organs-work-together-as-systems

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

Organs Team Up Into Body Systems

with Medi

Medi stands inside a giant, glowing model of a human body, pointing excitedly at a beating heart connected to a web of colorful blood vessels stretching in every direction, with a magnifying glass in hand.

Explain what a body system is and why organs work together in one.
Identify at least two organs that belong to the circulatory system.
Compare what the heart does alone versus what it can accomplish working with blood vessels.
Predict what would happen if one organ in a body system stopped doing its job.
Identify one other body system and name an organ that belongs to it.

Key terms

organ: a body part with an important job
body system: a group of organs sharing one big job
circulatory system: the heart and blood vessels working together
digestive system: the organs that break down your food
respiratory system: the organs that help you breathe air

Organs on a Team

Your body is full of organs, and each one has an important job. Your heart pumps blood, your lungs bring in air, and your stomach breaks down food. But organs do not work alone. When a group of organs team up to do one big job together, we call that a body system. It is like a soccer team, where everyone works together to win.

The Circulatory Team

The circulatory system is a great example of teamwork. The heart and blood vessels are its star players. The heart squeezes and pumps blood out through tubes called blood vessels. Together they carry oxygen and food to every cell in your body. Without blood vessels, the heart's pumping would go nowhere, so they truly need each other.

Worked examples

How do the heart and blood vessels work together?

The heart squeezes and pumps blood out.
Blood vessels are tubes that carry the blood.
Together they deliver oxygen and food to cells.

Answer: The heart pumps and the blood vessels carry, working as one team.

Hey there! I'm Medi, and today we're going on a tour inside your own body! Your body is full of organs — special parts that each have an important job. Your heart pumps blood. Your lungs bring in fresh air. Your stomach breaks down food. Each organ is amazing on its own, but here's the cool part: organs don't work alone! When a group of organs team up to do one big job together, we call that a body system. Think of it like a soccer team. One player can kick the ball, but it takes the whole team working together to actually win the game. The circulatory system is a perfect example. The heart and blood vessels are its star players. The heart squeezes and pumps blood out through tubes called blood vessels — arteries carry blood away from the heart, and veins carry it back. Together, they deliver oxygen and nutrients to every single cell in your body. Without the blood vessels, the heart's pumping would go nowhere. Without the heart, the blood vessels would just sit still. They need each other! Your body has many systems like this. The digestive system uses your mouth, stomach, and intestines to break food down into nutrients your body can use. The respiratory system uses your nose, windpipe, and lungs to get oxygen into your blood. Every system is a team of organs with a shared job. Hint: If you ever forget what a body system is, ask yourself — what big job are these organs all helping with?

Activity

Sort each organ card into the correct body system bucket on the screen.

Practice

What is a body system in your own words?

Name two organs in the circulatory system.

Common mistakes to avoid

Organs always work aloneOrgans team up in body systems to do one big job.
The heart works without blood vesselsThe heart needs blood vessels to carry blood through the body.

Check your understanding

What is a body system?

Which two organs work together as part of the circulatory system?

Layla thinks the heart can deliver oxygen to the whole body all by itself, without any blood vessels. Is she right?

Recap

Organs are body parts with important jobs, and they team up into body systems. The circulatory system uses the heart and blood vessels together to carry oxygen and food to every cell.

Reflect

Think of a team that wins only by working together!