Elasticity Tendency to return to initial size after distension High content of elastin proteins Very elastic and resist distension Recoil ability Elastic tension increases during inspiration and is reduced by recoil during expiration 1515 Elasticity • Tendency to return to initial size after distension. • High content of elastin proteins. – Very elastic and resist distension. • Recoil ability. • Elastic tension increases during inspiration and is reduced by recoil during expiration