Breathing and Exchange of Gasses
Respiratory volume
- The volume of air that a lung can receive, hold and expel under different conditions is called lung volume.
- Tidal volume is the volume of air inspired / expired during normal breathing (6000 to 8000 ml/min)
- Inspiratory Reserve Volume (IRV) 2500-3000 ml of air is the amount of air that is forcefully inspired after normal inspiration.
- ERV is the amount of air forcefully expired and is 1000 to 1100 ml.
- Volume of air, still remain in lung after the most forceful expiration is called residual volume and that is 1100-1200 ml.
- Combination of 2 or more pulmonary Volume is pulmonary capacity.
- Inspiratory capacity : TV + IRV
- Expiratory capacity : TV + ERV
- Functional residual capacity : RV + ERV
- Vital capacity : TV + IRV + ERV
- Vital capacity in generally higher for athletes, mountain dwellers, young children and men than women.
- Total lung capacity is the combination of all lung volume ie., TV + IRV + ERV + RV
- Dead space volume in lungs is about 150 ml that do not enter into respiratory zone rather stays in conduction zone of lungs.
Watch this video for the topic Respiratory volume from 12:13 to 25:08
Disclaimer: Compete.etutor.co may from time to time provide links to third party Internet sites under their respective fair use policy and it may from time to time provide materials from such third parties on this website. These third party sites and any third party materials are provided for viewers convenience and for non-commercial educational purpose only. Compete does not operate or control in any respect any information, products or services available on these third party sites. Compete.etutor.co makes no representations whatsoever concerning the content of these sites and the fact that compete.etutor.co has provided a link to such sites is NOT an endorsement, authorization, sponsorship, or affiliation by compete.etutor.co with respect to such sites, its services, the products displayed, its owners, or its providers.