🌱 Natural ScienceUnit 1 of 69 lessons
How do our bodies work?
Travel inside the human body! Find out how cells make tissues, organs and systems, follow the journey of food and air, discover how the heart, the kidneys and the reproductive system work, and learn why feeling good inside is part of being healthy.
🗂️ Study aid
The body systems at a glance
Tip: use a different colour for each system in your notebook. It helps you remember which organs go together.
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Circulatory system
heart · arteries · veins
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Respiratory system
nose and mouth · trachea · lungs · diaphragm
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Digestive system
mouth · oesophagus · stomach · small intestine · large intestine · anus
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Excretory system
kidneys · bladder · urethra · skin
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Male reproductive
testicles · penis · urethra
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Female reproductive
ovaries · uterus · vagina · vulva
Sigue con…
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The digestive system
Lesson 2 · 7 min
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Practice: cells, food and breathing
Lesson 4 · 10 ex.
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The circulatory system
Lesson 5 · 8 min