Text
Illustrated Encyclopedia of Science and Nature: Life Sciences #25, The Human Body I
ÔùÖ the Mysteries of Human Life ÔùÅ What is the human body made of? ÔùÅ How are new human cells formed? ÔùÅ What is DNA and what does it do? ÔùÅ How does human life begin? ÔùÅ How are egg and sperm cells made? ÔùÅ What is fertilization? ÔùÅ How does a baby grow in the womb? ÔùÅ How does a foetus get its food? ÔùÅ Why are some people born twins? ÔùÅ How does the brain develop? ÔùÅ Why do baby teeth fall out? ÔùÅ What is in vitro fertilization?rnrnÔùÖ Skeleton, Muscles, and Skin ÔùÅ How many bones are in the body? ÔùÅ How do bones grow? ÔùÅ How do muscles exert force? ÔùÅ How do muscles and joints work? ÔùÅ What causes a strained back? ÔùÅ Why do people sweat? ÔùÅ What are goose bumps? ÔùÅ How do nails and hair grow? ÔùÅ How does a cut heal? ÔùÅ Why does skin come in different colours?rnrnÔùÖ Respiration and Circulation ÔùÅ How do people breathe? ÔùÅ Why does the body need oxygen? ÔùÅ Where does the voice come from? ÔùÅ How does the heart keep beating? ÔùÅ How do veins and arteries differ? ÔùÅ Why is blood red? ÔùÅ Where is blood made? ÔùÅ What is blood pressure? ÔùÅ Why are blood types important? ÔùÅ What is carbon monoxide poisoning? ÔùÅ What are hormones?
No other version available