By Penny Smith
Ever questioned how your physique manages to stick upright or what occurs on your foodstuff upon getting eaten? good, ask yourself not more - the DK Human physique Encyclopedia has the entire solutions and extra. study all approximately what is going on inside of your physique - from the pumping energy of your middle, to the striking skill of the mind. you are going to by no means examine your self within the similar means back!
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Sample text
Blinking happens without you needing to think about it. 33 Breathing is automatic too. It carries on even when you are asleep. faster than a high-speed train. l e v a r t Messages Your brain controls your body. It receives messages from all parts of your body and decides what to do. You’ve got 150,000 km (93,200 miles) of nerves in your body. Pain-killers When you get a filling, the dentist gives you an anaesthetic. This drug stops nerves passing on pain messages for a short time. Pins and needles Sitting cross-legged for a long time squashes the nerves in your legs.
If something gets into your eye, or you feel strong emotions, the drops turn into floods of tears. u Yo Your eyes are fragile, squidgy balls made of watery jelly so they need to be well protected. Bone in your skull surrounds your brain and the backs of the eyes. Eye colour The iris is the coloured part of the eye. All eye colours are produced by one substance, melanin. Lots of melanin results in brown eyes, less means a lighter shade. Eyebrows sit above your eyes and prevent sweat dripping into them.
56 How long does a small cut take to stop bleeding? Bumps and cuts Bloodsucker A leech is a kind of worm that bites your skin and sucks out your blood. Leech saliva contains chemicals that stops blood from clotting. As a result, the cut keeps bleeding until the leech is full. Leeches live in wet, swampy places. They often slip down people’s shoes and bite their feet without being noticed. d Vampire bats a can stop blood n fr s che ing. lee clott om Platelets stick to each other and to other blood cells, causing a clot to start forming.
