Read e-book online 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 an attractive voyage via human biology and observe the body’s fine details as they’ve by no means obvious them sooner than. starting with the elemental construction blocks, carrying on with to the physique in motion, and concluding with the body’s structures, it is a compact and entire examine the sweetness that's the human computing device.

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5 billion times without taking a rest. Right atrium receives oxygen-poor blood Q Does the heart have its own blood supply? A The muscular wall of your heart needs an uninterrupted supply of fuel and oxygen to keep it beating. But it can’t get those supplies from the blood that gushes through its chambers. Instead it has its own special supply: two coronary arteries, shown here in this cast, branch repeatedly to carry oxygen-rich blood throughout the heart’s wall. Cast of coronary arteries Left coronary artery Right coronary artery What happens during a heartbeat?

Q Is an eye similar to a camera? A Cameras use lenses to focus light rays from an object to form an image on a light-sensitive surface. The eyes are no different. Light rays from an object are focused automatically, whatever its distance from the eyes, by the cornea and lens to form an upside-down image on the retina. This sends signals to the brain which enables you to “see” the object the right way up. Lens Cornea Retina Object Light rays Upside-down image Iris is the coloured part of the eye View seen by the left eye Object being viewed Pupil allows light into the eye’s interior Right eye Left eye Q How can I see in 3-D?

Other receptors in the tongue detect the texture and temperature of food. Nerve carries touch signals Nerve from the taste buds at the All five basic tastes are front of the tongue detected by taste buds all over the tongue Fungiform papilla Filiform papilla Nasal cavity carries air Surface of the tongue Q What are the tiny bumps on my tongue? A Look closely at your tongue in a mirror and you will see that it is covered with tiny bumps, called papillae. Fungiform (“mushroom-shaped”) papillae house the taste buds in their sides and tops, as do the large vallate papillae right at the back of the tongue.

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Amazing Human Body (Dk) by Richard Walker

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