Human Anatomy & Physiology Questions – Part 17

This is the Part 17 general knowledge questions and answers section on “Human Anatomy & Physiology” with explanation for various interview, competitive examination and entrance test. Solved examples with detailed answer description, explanation are given and it would be easy to understand.

161. What are joints?
Joints are like hinges that join bones together and allow bending, twisting movements. The shoulder and hip joints have the best range movements.

162. How many teeth do the children have?
They are borne without teeth,young children have 20 milk teeth that are slowly replaced around the age of six until they have full set of 32.

163. What are senses?
Every human have five senses, each one giving important information. We see with out eyes, hear with our ears, taste with our tongue, smell with our nose and feel through our skin.

164. What is the weight of the brain?
1.4 kg (3 lb)

165. Why food is cooked?
When food is cooked, the heat kills harmful germs. Cooked food is easier to digest, it also keeps longer and tastes nicer.

166. What is the average height of the man?
The average adult measures between 5 feet 8 inches.

167. What is the life cycle of the red blood cell?
Red blood cells live for one to four months, but in that time each red cell travels around the body upto 172,000 times, and in every second the bone narrow produces around 5 million new cells.

168. How many hairs are lost a day?
About 30 to 60 hairs are lost every day. Each hair last from one to six years before the hair root withers and hair drops out.

169. What is the growth rate of the hair?
The hair grows about 2.3 mm (0.09 in) a week, that is about 12 cm (4.75 in ) a year.

170. What prevents food from going into lungs when a man swallows food?
Although a man breathes air and swallows food through mouth, a flap of skin at the back of the throat, called the epiglottis, closes off the wind pipe when we swallow.

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