Richard Walker's Amazing Human Body (Dk) PDF

By Richard Walker

ISBN-10: 0753413701

ISBN-13: 9780753413708

ISBN-10: 0753462923

ISBN-13: 9780753462928

ISBN-10: 1405336684

ISBN-13: 9781405336680

Readers embark on a beautiful voyage via human biology and realize the body’s fine details as they’ve by no means visible them ahead of. starting with the fundamental development blocks, carrying on with to the physique in motion, and concluding with the body’s structures, this can be a compact and accomplished examine the sweetness that's the human computer.

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Computer model of a chromosome How are identical twins the same? When humans reproduce, slightly different DNA instructions from each parent come together in the fertilized egg to create a unique individual. These develop into twin babies that look identical because they share exactly the same DNA. Human chromosomes Q How many chromosomes do I have? A There are 23 pairs of chromosomes inside a body cell, which are here arranged and numbered in order of size from 1 (longest) to 22 (shortest). The 23rd pair is the sex chromosomes – XY in males and XX in females – which determine a person’s sex.

But if it is too high for long periods it can cause health problems. Sphygmomanometer heart, it races along the largest arteries at around 1 m (3 ft) per second. It slows down in smaller arteries and becomes even more sluggish as it travels along capillaries and veins. That said, a red blood cell takes, on average, under a minute to get around the circulatory circuit. The slick lining of blood vessels ensures that blood flows smoothly. 47 How does my body protect itself ? You are constantly exposed to germs that will make you ill if they get inside your body.

Neural network at 6 years Neural network at birth More Facts 3 Q What is the menstrual cycle? A This sequence of events, which repeats itself on average every 28 days, prepares the uterus to receive a fertilized egg. During a menstrual cycle the lining of the uterus thickens and, around day 14, an egg is released from an ovary. If the egg is fertilized it implants in the thick uterus lining. If not, the lining is shed during a period. grows in the uterus. At first it is made of flexible cartilage, but gradually this is replaced by harder bone.

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Amazing Human Body (Dk) by Richard Walker


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