Respiratory system - developmental changes, Biology

Respiratory System - Developmental Changes after Birth

The new-born's lungs are collapsed and need powerful breaths to inflate them; airways too are small, offering remarkable resistance to flow of air. The surface tension tends to hold the moist membranes together. The lungs of a full term baby secrete surfactant that has the unique property of exerting high surface tension while the lungs an expanded but a low surface tension while the lungs are collapsed. So after the first powerful breath which expands the lungs, breathing becomes easier, due to the reduced surface tension of collapsed lungs.

Posted Date: 2/1/2013 3:15:41 AM | Location : United States







Related Discussions:- Respiratory system - developmental changes, Assignment Help, Ask Question on Respiratory system - developmental changes, Get Answer, Expert's Help, Respiratory system - developmental changes Discussions

Write discussion on Respiratory system - developmental changes
Your posts are moderated
Related Questions
In the short term what will occur to the levels above and below a population of secondary consumers of a numeric pyramid if a large number of individuals from this population dies?

Osteogenesis: Production of Bone on Soft Tissue Now that we know the players in bone adaptation, we will look at the ways in which bone may be created and modified. There are t

Anterior superior alveolar nerve It is a branch of infraorbital nerve which arises within the infraorbital canal. It gives a nasal branch which passes into nasal cavity to supp

state one benefit of including vegetable fibre in the diet

What is karyotype? The name karyotype is given to the set of chromosomes of an individual, generally when visualized and identified under the microscope. The visualization usua

Feeding Mechanisms of Animals All animals have evolved successful methods for extracting their required nutrition from the environment. Thus we find a diversity of feeding mec

State the concept of type locus interaction Some of the major contributions included the concept of type locus interaction, the analysis of quantitative as opposed to qualitati

type of nutrition in platypus and ant eater


Production of substances interfering with virus proliferation In some cases plants are known to synthesise chemicals that inhibit crucial functions of pathogens. This makes pl