Inspiration

• give the process of inspiration?

  1. External intercostal and diaphragm muscles CONTRACT,
  2. causes the ribcage to move upwards & outwards and the diaphragm flattens, increasing volume of thoracic cavity
• what happens as the vol of the thoracic cavity increases?

  the lung pressure decreases

  ( to below atmospheric pressure)
• what is the thoracic cavity home to?

  the lungs - thoracic cavity is the space where the lungs are
• which way will air always flow?

  from an area of higher pressure to an area of lower pressure (DOWN a pressure gradient) so air flows DOWN THE TRACHEA AND INTO THE LUNGS
• What sort of process is inspiration?

  an active processs
• what does inspiration require?

  energy
• is inspiration an active or passive process?

  active