https://padlet.com/h_trehy_wso/rnklb0s6v7ro en-us 2019-11-14 05:02:44 UTC 2019-11-14 06:21:14 UTC hello@padlet.com https://padlet.com/h_trehy_wso/rnklb0s6v7ro/wish/411018567 During inhalation, the diaphragm contracts and moves downwards, increasing the thoracic cavity and allowing more air to enter. The air pressure is higher outside the body than inside the body, allowing air to enter. The opposite happens from exhalation, where the diaphragm contracts. 

]]> 2019-11-14 06:04:05 UTC https://padlet.com/h_trehy_wso/rnklb0s6v7ro/wish/411018567 https://padlet.com/h_trehy_wso/rnklb0s6v7ro/wish/411018673 inhalation = external intercostal muscles

exhalation = internal intercostal muscles]]> 2019-11-14 06:04:48 UTC https://padlet.com/h_trehy_wso/rnklb0s6v7ro/wish/411018673 https://padlet.com/h_trehy_wso/rnklb0s6v7ro/wish/411018807 Expansion and contraction of the thoracic cavity. The diaphragm and, to a lesser extent, the intercostal muscles drive respiration during  quiet breathing. Additional 'accessory muscles of respiration' are typically only used under conditions of high metabolic demand (e.g. exercise) or respiratory dysfunction (e.g. an asthma). However, in instances where these accessory muscles become stiff and hard, expansion of the rib cage can be restricted. Maintenance of the elasticity of these muscles is crucial to the health of the respiratory system and to maximize its functional capabilities.]]> 2019-11-14 06:05:44 UTC https://padlet.com/h_trehy_wso/rnklb0s6v7ro/wish/411018807 https://padlet.com/h_trehy_wso/rnklb0s6v7ro/wish/411020269  The contraction of  respiratory muscles during the process of breathing changes volume of thoracic cavity. Gases move from region of high pressure to a region of lower pressure. During inhalation, air moves into the lungs. The pressure in the chest is less than the atmospheric pressure. During exhalation, air moves out of the lungs. The pressure in chest is greater than athmspheric pressure]]> 2019-11-14 06:15:25 UTC https://padlet.com/h_trehy_wso/rnklb0s6v7ro/wish/411020269