why do humans need to eat food?

Answer 1

eating food is a need of human being because for being alive we need blood, to make blood we need food, we also need energy, to produce energy we have to break the strong links of atp, so we need atp, to produce atp, we need food, when someone is alive, grows up, to grow up we need more substances, hormones and materials, to earn them we need food, to be alive our body needs some vitamins, to produce and take tese vitamins we need food and many other metabolisms that need energy and substances that shows us we need food!!! because cload bernard says we can not define life except we recognise it from its influences. what are life's influences? growth, metabolism,and reproduction. and in all of these activitis we need food!

Answer 2

Simplest answer: we don't.

If you stop eating food and instead were given nutrition through a tube that would supply nutrietents you could live a long long time. Search on parenteral nutrition.

I suspect the real question, though, is why do humans need nutrition? Again, a simple answer -- the metabolic processes of breathing, pumping blood, even thinking all take energy. Nutrition supplies that energy AND the chemical compounds that our bodies need to make/repair cells.

Answer 3

feeding is one of the 7 vital functions of any living organism. to keep alive, any organism needs some source of external energy. autotrophs (plants) feeds on the sun's energy, saprophytes (funghi) feeds by absorbing chemiclas from dead stuff. in our case, we humans need ready made food, that is complex nutritive food full of what we are made off. ie, proteins, carbohydrates and fats. As living creatures we need to move and use up energy. that energy comes from the food we eat, which then is digested and absorbed. We eat food just to obtain its proteins/ carbohydrates / fats / vitamins, which in turn are 'burnt' by a process called respiration. This probides us with ATP/ADP (Adenosine tri/di-phosphate). This is chemical energy we need to move and stay alibe.

So, humans need to eat food because we need an external source of energy. Food is wisely processed by our wise and effecient digestive system, which then builds ATP which is converted to the energy we all need to stay alive.

Answer 4

humans get energy from the food that we eat. if we will not eat we dont have the energy needed to perform our activities. also, the proper physical growth wont be attained without the nutrients from the food that we eat

Answer 5

It's very simple. We need for to produce energy to function. Without the carbohydrates, amino acids,and fatty acids from the food we eat, we would not be able to produce ATP (Adenosine Triphosphate) that is needed to fuel our body's functions and processes.

Answer 6

Because it would be impossible to push a banana straight into your veins.