Question

Mammals have negative -pressure breathing.

Answer 1

• All mammals use lungs for breathing.
• The organs involved in breathing are lungs, diaphragm, intercostal muscles, ribs.
• during inhalation where the air is to be inhaled inside the lung. The intercoastal muscles contract and the lung cavity expands while the diaphragm contracts and takes a dome shape. Due to these the space inside the lung cavity increases and the pressure in the lungs decreases due to which the air from the atmosphere moves to the lungs, as air flow is from its high pressure to its low pressure.
• So it can be said that the breathing in mammals is possible due to formation od low pressure in the lungs.
• Therefore mammals have negative pressure breathing.