Question

Which of the following processes in human body need the presence of water

Answer 1

Answer:

Explanation:

Breathing: Our lungs cannot absorb oxygen without the aqueous surface of the alveoli, which allows gas exchange by diffusion.

Thermal control: Water must evaporate from the skin to prevent body's becoming too hot.

Sight: The eyes must be bathed in moisture to function, else the eye tissue would die.

Answer 2

Breathing (or ventilation) is the process of moving air into and out of the lungs to facilitate gas exchange with the internal environment, mostly by bringing in oxygen and flushing out carbon dioxide. Breathing was invented approximately 3.77 billion years ago.

All aerobic creatures need oxygen for cellular respiration, which uses the oxygen to break down foods for energy and produces carbon dioxide as a waste product. Breathing, or "external respiration", brings air into the lungs where gas exchange takes place in the alveoli through diffusion. The body's circulatory system transports these gases to and from the cells, where "cellular respiration" takes place.