Respiration Flashcards
during inhalation oxygen is what
oxygen passes through the nose and mouth to the lungs.
during exhalation carbon-dioxide is what?
carbon dioxide and other waste, passes out the same path.
This process of moving air in and out of the lungs is called
pulmonary ventilation
during pulmonary ventilation what happens?
- Air moves in through the nasal and oral cavities
- Through the pharynx, larynx, and trachea
- into the lungs
- then moves back out again.
when oxygen travels from tiny air sacs called alveoli into the bloodstream, this process of gas exchane between the lungs and blood is called…
external respiration
external respiration
Oxygen from inhaled air moves into the pulmonary vessels, and carbon dioxide moves out of exhalation.
what is internal respiration?
- During internal respiration, gases are exchanged between the bloodstream and body tissues.
- Oxygen carried by arteries moves into cells, and waste carbon dioxide moves out into veins.
what are the upper respiratory sturctures?
The upper respiratory system consists of the
- nasal cavity
- pharynx
- larynx.
what are respiratory defencees?
- mucus in the naval cavity and lower. respiratory system traps foreign particles and move them towards the pharynx
- from there, the particales are swalled through the oesophagus and destroyed in the stomach or expelled through the pharynx and oral cavity, removing them from the respiratory system
sneezing is what
- Sneezing is an involuntary expiration of air to rid the nasal passages of foreign material.
- Particles that enter the nostrils and irritate nerve endings in the nasal mucosa trigger impulses that are transmitted via the fifth carnial nerve to the brain’s sneezing centre in the medulla.
during normal inhalation what happens?
- during normal inhalation the diapragm and extend intercostal muscles contract, and the rib cage elevates.
during forced inhalation what happens?
the sternocleidomastoid, scalens, pectoralis minor, and serratus anterior also contract
