Excretory System (School Safe)

The oesophagus (food pipe) is a tube that starts at your mouth and ends at your...

• Intestines

• Stomach

• Bladder

• Lungs

Answer explanation

The oesophagus starts at your mouth and ends at your stomach. The muscles of the oesophagus push food down the tube by contracting behind the food. The muscles then relax.

This process is called peristalsis.

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The small intestine is the longest part of your digestive tract- up to _ metres long

• 1

• 10

• 6

• 63.7

Answer explanation

The small intestine can get up to 6 metres long. The 'small' intestine gets its name because of its diameter, which is only 3 centimetres.

The _________ closes the end of your windpipe as you swallow.

Answer explanation

The epiglottis makes sure that the food goes into your stomach and not into your lungs through the windpipe.

Which organs help to remove waste from the body?

• Lungs, stomach, bladder, and kidneys

• Lungs, heart, bones, and bladder

• Lungs, large intestine, bladder and kidneys

• Lungs, esophagus, bladder and kidneys

What are the two types of digestion?

• Mechanical digestion,

  Chemical digestion

• Food digestion,

  Water digestion

• Basic digestion,

  Complex digestion

• Nutrition digestion,

  Protein digestion

Answer explanation

Mechanical and Chemical Digestion

Mechanical digestion is when food is broken into smaller pieces by your teeth, it is a physical change because no new substances are made.

In Chemical digestion, the large substances in food is broken down into simple chemicals by saliva in your mouth and gastric juice in your stomach. This produces new, smaller chemicals that your body can absorb.

Circle where you think the stomach is

Humans are ____________ organisms

• Compacted

• Complex

• Living

• Multicellular

Answer explanation

Humans are multicellular organisms. This means that out bodies are made up of millions of microscopic cells.

-------------------------------------------------In this image, you can see these cells.

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Cells come in many types, such as skin cells, brain cells, and ____________

• Microscopic cells

• Bone cells

• Muscle cells

• Air cells

Answer explanation

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Which of the following is not part of your excretory system?

• Heart

• Lungs

• Kidneys

• Skin

Quick thinking:

What organ produces inculin?