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Science lesson plan · 7th grade (Year 8 in England) · 45 minutes

Follow blood through the heart and lungs

Human body and health

CCSS NGSS.MS-LS1-3England: KS3 Biology: Gas exchange systemsEngland: GCSE Combined Science: Organisation

Objective and success criteria

Students will: Follow blood through the heart and lungs.

  • I can answer questions on today's skill on my own, without help.
  • I can explain each step and say why it works.
  • I can check my answer and spot a mistake.

Before and after

Needs first: Heart, blood and circulation

Leads to: Heart rate, stroke volume and cardiac output

Materials: Stopwatches, Body diagrams, Mini whiteboards, A diagram or short video clip of the idea, Printed student sheet (below).

Warm-up · 5 min

  • Quick retrieval from earlier learning (Heart, blood and circulation). Students answer on mini whiteboards.
  • Show answers together and note who needs support in the main task.
  1. Priya counts 16 pulse beats in 15 seconds. What is the pulse rate in beats per minute? → 64Prompt: How many lots of 15 seconds are there in one minute?
  2. What do arteries do? (make urine / digest food / carry blood away from the heart / carry blood back to the heart) → carry blood away from the heartPrompt: "A" for arteries, "A" for away.
  3. Blood and circulation: which statement is NOT true? (Blood in veins is blue. / Veins carry blood back to the heart. / Blood is always red; it is bright red with oxygen and darker red without. / Capillaries are tiny blood vessels where substances pass to and from cells.) → Blood in veins is blue.Prompt: One of these is a famous myth.

Hook · 5 min

  • Ask everyone to find their pulse, then jump for 30 seconds and find it again.
  • Share the objective: Follow blood through the heart and lungs. Read the success criteria together.

I do: model it · 10 min

  • Work through the example out loud, saying why you do each step, not just what you do.
  • Example: Following blood from the lungs to the body: where does blood go straight after the lungs?
  • Step 1: lungs → pulmonary vein → left atrium → left ventricle → aorta
  • Step 2: So the answer is: pulmonary vein
  • Answer: pulmonary vein
  • Pause after each step and ask a student to say what comes next.

We do: guided practice · 10 min

  • Do these together. Students try each step on whiteboards before you reveal it.
  • Use the hints as prompts rather than giving the answer.
  1. Following blood from the body to the lungs: where does blood go straight after the right atrium? (right ventricle / pulmonary artery / vena cava / lungs) → right ventriclePrompt: This side of the heart carries blood low in oxygen.
  2. Why is the wall of the left ventricle thicker than the right? (It holds more blood / It pumps blood all round the body, so it needs more force / It pumps blood to the lungs only / It is older) → It pumps blood all round the body, so it needs more forcePrompt: Compare how far blood goes from each ventricle.

You do: independent practice · 10 min

  • Students work on the student sheet. Circulate and check the first two answers of every student early.
  • Students who finish: write a question of their own for a partner, with the answer.

The 8 questions are on the student sheet below, with answers in the key.

Exit ticket · 5 min

  • Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.
  1. Humans have a double circulatory system. What does that mean? (blood passes through the heart twice on each full trip round the body / blood flows both ways in each vessel / we have two hearts / only half the blood reaches the lungs) → blood passes through the heart twice on each full trip round the bodyPrompt: One loop goes to the lungs, one to the body.
  2. Following blood from the lungs to the body: where does blood go straight after the pulmonary vein? (left atrium / aorta / lungs / left ventricle) → left atriumPrompt: This side of the heart carries oxygenated blood.

Watch out for

  • Everyday meanings of words getting in the way of the science meaning: define key words explicitly.
  • Remembering facts without the reason: ask "why?" and "what is the evidence?"

Support and stretch

Support

  • Review first: Heart, blood and circulation.
  • Use concrete materials: stopwatches.
  • Give the first step of each question, or a partly worked example to finish.
  • Pair with a confident partner for the guided practice.

Stretch

  • Move on to: Heart rate, stroke volume and cardiac output.
  • Explain a common mistake in writing and how to fix it.
  • Write a word problem that uses today's skill, then solve a partner's.

Homework and more practice

Free online practice with hints and printable worksheets for this skill: eurekami.com/science/grade-7.

Free lesson plan from eurekami.com/lesson-plan-builder

eurekami

Follow blood through the heart and lungs

Name

Date

Score/ 8

  1. Question 1

    Following blood from the lungs to the body: where does blood go straight after the pulmonary vein?

    • A. left atrium
    • B. lungs
    • C. left ventricle
    • D. aorta

  2. Question 2

    Which blood vessel carries oxygen-rich blood from the lungs to the heart?

    • A. aorta
    • B. pulmonary artery
    • C. pulmonary vein
    • D. vena cava

  3. Question 3

    Following blood from the lungs to the body: where does blood go straight after the lungs?

    • A. aorta
    • B. pulmonary vein
    • C. left ventricle
    • D. left atrium

  4. Question 4

    What is the job of the valves in the heart?

    • A. to make blood cells
    • B. to stop blood flowing backwards
    • C. to slow the heartbeat
    • D. to add oxygen to blood

  5. Question 5

    Following blood from the body to the lungs: where does blood go straight after the vena cava?

    • A. lungs
    • B. right ventricle
    • C. right atrium
    • D. pulmonary artery

  6. Question 6

    Why is the wall of the left ventricle thicker than the right?

    • A. It holds more blood
    • B. It is older
    • C. It pumps blood all round the body, so it needs more force
    • D. It pumps blood to the lungs only

  7. Question 7

    Following blood from the body to the lungs: where does blood go straight after the right atrium?

    • A. right ventricle
    • B. vena cava
    • C. lungs
    • D. pulmonary artery

  8. Question 8

    Following blood from the body to the lungs: where does blood go straight after the pulmonary artery?

    • A. right ventricle
    • B. lungs
    • C. vena cava
    • D. right atrium

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Answer key: Follow blood through the heart and lungs

  1. 1. A. left atrium

  2. 2. C. pulmonary vein

  3. 3. B. pulmonary vein

  4. 4. B. to stop blood flowing backwards

  5. 5. C. right atrium

  6. 6. C. It pumps blood all round the body, so it needs more force

  7. 7. A. right ventricle

  8. 8. B. lungs