By Richard Walker

Readers embark on a lovely voyage via human biology and realize the body’s bits and bobs as they’ve by no means obvious them prior to. starting with the fundamental construction blocks, carrying on with to the physique in motion, and concluding with the body’s platforms, it is a compact and accomplished examine the sweetness that's the human computer.

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Q What are sound waves? A Anything that moves or vibrates creates waves of pressure, called sound waves, that travel through the air. On entering your ear they make the eardrum vibrate. This, in turn, sets up pressure waves in the fluid-filled cochlea of the inner ear. These bend tiny “hairs” on the cochlea’s hair cells causing them to send signals to the hearing part of your brain. Q Are there any bones in my ear? A Linking the eardrum to the inner ear are three small bones, or ossicles, individually named the hammer, anvil, and stirrup after their shapes.

Each month, one of the ovaries releases a mature egg into the fallopian tube. If the egg meets sperm within one day of its release, fertilization will happen. Once a sperm has penetrated the outer covering of the egg, its nucleus fuses with the egg’s nucleus to form a fertilized egg. Female reproductive system Sperm penetrating an egg What is fertilization? The job of the reproductive system is to produce babies. Unlike other body systems, male and female reproductive systems are very different.

Reflex tears are a response to irritants such as onion odours or bright light. Emotional tears, unique to humans, flow when you are very sad, happy, or in pain, and contain natural painkillers. A Emotional crying Jumping spider More Facts ■ Jumping spiders have eight eyes, including two large, forward-facing eyes that enable it to judge distances very accurately and pounce on unwary prey. ■ Your eyes contain more than 70 per cent of your body’s sensory receptors. They can detect and distinguish between some 10,000 different colours.

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