The main reason for which we are dependent on air is our _____. 

The correct answer is respiration.

Key Points

• Respiration is the process by which organisms exchange gases with their environment.
• Humans and most other animals require oxygen from the air for the process of cellular respiration.
• Cellular respiration takes place in the mitochondria of cells, where oxygen is used to convert glucose into ATP (adenosine triphosphate), the energy currency of the cell.
• During this process, carbon dioxide is produced as a waste product and must be expelled from the body.
• The respiratory system includes structures such as the nose, trachea, lungs, and diaphragm.
• Breathing involves the movement of air into and out of the lungs, allowing for the exchange of oxygen and carbon dioxide.
• Maintaining proper respiration is vital for energy production, metabolic processes, and overall homeostasis in the body.

 Additional Information

• Osmoregulation
  • Osmoregulation is the process by which organisms regulate the balance of water and electrolytes in their bodies to maintain homeostasis.
  • This process involves organs such as the kidneys in humans, which filter blood and regulate water and salt levels.
• Excretion
  • Excretion is the process by which metabolic waste products and toxic substances are removed from the body.
  • In humans, the kidneys, liver, lungs, and skin play key roles in the excretory process.
• Digestion
  • Digestion is the process of breaking down food into smaller molecules that can be absorbed and utilized by the body.
  • The digestive system includes organs such as the mouth, esophagus, stomach, intestines, and pancreas.