Page 85 - Grasp English B2 (Student Book)

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Science Human Digestive System

C. Correct the sentences.

1. Bacteria in the GI tract is harmful to the process of
digestion.
2. The gall bladder produces bile.
3. The pancreas is located near the anus.
4. We can digest all the food we eat.

Project

D. Work in a group of four to teach the class about an
organ system in the human body. Choose one of the
following:

• the skeletal system
• the circulatory system
• the respiratory system
• the muscular system
Process:
• Choose a system and research how it works.
• Take notes, especially on amazing or surprising facts.
• Find images and/or video clips.
• Decide on the best way to teach the class.
Suggestions/Ideas:
• Write a quiz for the other groups to do together,
including the amazing facts.
• Print a skeletal cut-out, and then put the parts in an
envelope for each group. Let the groups assemble
the skeleton.
• Have students identify the place of their own organs
or bones with labelled sticky notes.
• Act out or physically demonstrate how blood, air, or
muscles move in the body.
• Find sound effects to match the organ system.
• Create an original power point or short film to show
how the system works.

E. How does the heart work?

Materials

a glass jar Instructions
two straws Half-fill one of the jars with water mixed with red food colouring.
a balloon Stretch the balloon over the cup, and make two small holes in the
a large dish top, approximately 2 cm apart. Put a straw into each hole, so that
water they sit in the water. Attach a lump of modelling clay to one of the
red food colouring straws, covering the opening at the top. Put the jar on the dish to catch
modelling clay any liquid. Gently push the balloon into the jar (heart) and watch as
scissors the water comes out of the straw (artery). The modelling clay (valve)
ensures the blood only flows in one direction.

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