what role do the diaphragm and rib muscles play in the process in inhalation and exhalation?

Answer 1

The diaphram goes up and down as you breathe, but I forgot about the muscles.

Answer 2

Contraction of the diaphragm is responsible for inhalation. Exhalation is largely a passive process except when the respiratory rate goes up. The intercostal muscles (rib muscles) are considered accessory muscles of ventilation. When the respiratory rate increases or when there is a disease process such as asthma, these accessory muscles play a greater role, both in inspiration and expiration.

Answer 3

One thing you have to remember is that the diaphragm is a sheet of tissue which seperates the thorax from the abdomen and it has a dome shape when it is relaxed. The ribs are moved by the intercostal muscles. The external intercostal muscles pull the ribcage upwards and outwards and the internal costal muscles pull the ribcage downwards and inwards.

When you inhale, the diaphragm muscles contract and pull the diaphragm down. It causes the lungs to expand. The external intercostal muscles conract and pull the rib cage upwards and outwards. This also contributes to the expansion of the lungs. Therefore, the air is sucked in.

When you exhale, the diaphragm relaxes and assumes its dome shape. the lungs return to their original size and volume. the internal intercostal muscles contract, pulling the ribcage inwards and downwards. This also causes the lungs to return to its original shape. Therefore, the air is pushed out and you exhale.

Hope this helps.

Answer 4

Rib Muscles

Answer 5

INHALATION:
The diaphragm flatens out to draw air into the lungs and the External incoastal muscles push the rib cage up and out
EXHALATION:
The diaphragm relaxes and the internal intercoastal muscles draw the rib cage down and in.

Answer 6

the diphragm drops and causes negative pressure in the lungs, enabling them to inflate. Nature abhors a vacuum. Intercostal (rib) muscles facilitate inhalation by the same method and play an important part in forced exhalation to reduce/utilize IRV(inspiritory reserve volume) during sneezing or coughing

Answer 7

When the intercostal (rib) muscles and diaphragm contract this increases the volume of the lungs, which in turn lowers the air presssure in the lungs and thus air is pushed into them by the air pressure outside the lungs. When they relax the voume decreases, air pressure increases and air is forced out of the lungs.