Human Anatomy & Physiology Questions – Part 16

This is the Part 16 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.

151. How much air we breath in our life time?
Adults take in about 0.5 litres (just under half a pint) of air with every breath everyday each person needs about 15,000 litres(530 cu.ft) of air. In a life time each person breath in about 400,000 cu meters (14 million cu.ft) of air.

152. Where do we have the thickest skin?
The thickesst skin 0.3mm (0.12in) is on the soles of the feet.

153. How big in a human stomach?
Human stomach allow us to eat a lot, but they are small when compared with those of animals, Human stomach holds about 1.5 litres (2.5 pints); where as a cow’s stomach holds about 180 litres (40 gallons)

154. How much time does the heart of a human beat in a life time?
When a person is resting the heart beats about 70-80 times a minute. So it beats about 100,00 times a day, and if a person live to be 70 it will have to beat nearly 3,000 million times without stopping.

155.How long are the blood vessels?
Human body contains about 100,000 km (6.,000 miles) of blood vessels. Arteries take blood away from the heart while veins carry it back

156. Which are the human excretions?
All living things have to get rid of waste. Human excrete carbon dioxide and water through out lungs, nitrogen compounds, salts and water through urine, and some salt and water through sweat we also get rid of undigested parts of food but this is not true excretion, because undigested food never passes through our cells.

157. Who discovered that glucose, the main source of energy for the body, is stored in the liver?
The french scientist Claude Bernard (1813 – 1878)

158. What is called immunity?
Once the body have been attacked by a certain bacterium, the immune system “remembers” its chemical make up. So, it can respond very quickly to a second attack. This is called immunity.

159.What are fixed joints?
Some joints are locked together and cannot move. These are found between the bones that protect the brain, in the skull. When the skull first forms, its bones are separate. They gradually grow together.

160. How do our muscles work?
The muscles work by pulling (never pushing)on the bones of the skeleton, to which they are attached.

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