The heart is a pump
Today I can explain what the heart does and what it looks like.
A Look back3 min
- 1.
Ali counted how many beans sprouted each day. Which day had the most? Circle one.
MonTueWed - 2.
Ali made a tally of how children in the class get to school. Which way do more children travel? Write it in the box.
- 3.
In this food chain, the rabbit eats grass. Which animal eats the rabbit? Circle it.
foxgrasssnail
B Watch me, then you4 min
Ali sees a heart drawn on a birthday card. Is a real heart that shape, and what does it do?
A real heart is shaped like an upside-down pear, not like a card heart.
The heart fills with blood.
The muscle squeezes and pushes the blood out.
Valves snap shut, so the blood cannot flow backwards.
- 1.
Valves act like one-way doors. What do they stop? Circle one.
blood flowing backwardsair getting infood going into the bloodthe heart beating
C Your turn8 min
Answer each question about the heart's job and its shape.

- 1.
What is the heart's job? Circle one.
make bloodpump blood round the bodyclean the bloodstore food - 2.
Which shape is a real heart like? Circle one.
upside-down pearlove-heart shapesquare boxflat disc - 3.
Join each part to its job.
HeartValvesBlood vesselsstop blood flowing backwardscarry blood around the bodypump blood - 4.
Squeeze your fist tight, then open it. Which part of the heart works like your fist? Write it in the box.
Say it out loud: Which question made you think hardest, and how did you check your answer?
D Spot the mistake3 min

- 1.
What does the heart really do? Circle one.
pumps blood to every part of the bodymakes new bloodcleans the bloodstores blood
E Think deeper4 min
- 1.
A jam jar pump has a balloon stretched over the top and two straws. Pressing the balloon pushes red water out of a straw. Write one part that is like the heart, and one way the model is different.