Question

why it is difficult to hold one's breath beyond the limit​

Answer 1

Answer:

process of inhalation or exaltation circulation of blood in body

Answer 2

Answer:

When you hold your breath the ongoing accumulation of carbon dioxide in your cells, in your blood and lungs will eventually irritate and trigger impulses from the respiratory center part of your brain. Rising levels of carbon dioxide signal the body to breathe and ensure our unconscious and autonomous respiration.