Regulation of Respiration

- Neural system maintains respiratory rhythm of body according to the body needs via following parts of brain :

$1.$ Medulla : It possess :

$\mathbf{A}.$ Respiratory rhythm centre - It is primarily responsible for regulation of respiratory rhythm.

$\mathbf{B}.$ Chemosensitive area - It is situated adjacent to the Respiratory rhythm centre. Increase in $\mathrm{C}{\mathrm{O}}_2$ and ${\mathrm{H}}^{+}$ concentration $\to$ Stimulation of Chemosensitive area $\to$ Sends signal to the Respiratory rhythm centre to make necessary changes in the respiratory process for the elimination of these substances.

$2.$ Pons: It possess pneumotaxic centre, that moderates the functions of the respiratory rhythm centre. Stimulation of this centre alters the respiratory rate by reducing the duration of inspiration.