Their lungs are functional early but the larvae don't make as much use of them as do tadpoles.

Their large lungs have adapted to permit rapid exchange of oxygen and to avoid trapping gases during deep dives.

Their lungs are highly vascularized to facilitate gas exchange.

Their lungs become fully developed, allowing for a fully terrestrial existence.

Their metamorphosis from the larval stage is incomplete, so that the adults retain gill slits ( although they also have lungs ), and lack eyelids.

Their father, Philip, the driver of the Previa, was taken to the University Hospital of North Staffordshire with fractures to the neck, back, ribs and swelling of the lungs ; while a 49-year-old man and his two sons, aged eight and fifteen, were treated for minor injuries.

Their faces are stained by the hue of a green oxygenated liquid, which is believed to cushion their lungs against the extreme acceleration of interstellar flight ; this liquid is contained in their helmets.

Their defining characteristics are their extra vertebrae ( bringing the total to nine ) and the remains of the tail muscles ( the tail itself is absent in adults, although it is present in the younger frogs, who need the extra skin surface until their lungs are fully developed ).

Their lungs extract oxygen more efficiently than normal unmodified humans, allowing them to exert themselves without getting short of breath, or function at high altitudes.

" Their classification of Katrina's death as a possible accidental drowning seems to confirm that ; having been dead for perhaps a half hour or more before Spike put her in the river, Katrina could not have had any water in her lungs to support a diagnosis of drowning, and a coroner could probably have determined that she suffered the actual cause of death, a blunt blow to the head, prior to immersion.

Their skeletons changed so that their limbs were more flexible ( they became less laterally splayed, allowing for faster forward motion ) and they developed a shorter ribcage and larger lungs to allow for faster respiration.

Their own assessment was that 35 % of the patients improved greatly, 35 % improved moderately and that in the remaining 30 % there was no change.

Their service improved communications in terms of speed of encryption at both ends in front line operations during World War II.

Researchers at University College London have questioned the wisdom of suppressing the immune system in Crohn's, as the problem may be an underactive rather than an overactive immune system: Their study found that Crohn's patients showed an abnormally low response to an introduced infection, marked by a poor flow of blood to the wound, and the response improved when the patients were given sildenafil citrate.

Their goal was to have their living conditions improved and the chibata ( whips or lashes ) banned from the navy.

Their successors gradually improved handling and size through the 1780s.

Their situation improved in 1949 after the Chinese Communist army of Mao Zedong defeated the Nationalist army led by Chiang Kai-Shek.

Their children will not exhibit the learned improvements and, in turn, will need to be improved.

Their use greatly improved the accuracy and destructiveness of raids.

Their fortunes improved when their only daughter, Princess Victoria Mary of Teck ( known as May to her family ) became engaged to the second-in-line to the British throne, Prince Albert Victor, Duke of Clarence.

Their improved development of the Maxim gun design, the Vickers machine gun, after Maxim's resignation from the board in 1911 on his 71st birthday, was the standard British machine gun for many years.

Their relationship had not improved in recent years, and many anticipated the imminent replacement of the government.

Their fourth album, Karmacode, improved on that achievement, having sold over 490, 000 copies since its release, and peaking at # 28 on the US Billboard Album Chart.

Their reputation improved.

Their tow was driven by the rear wheel of a Ford Model A. Wallace " Bunny " Bertram took it over for the second season, improved the operation, renamed it from Ski-Way to Ski Tow,

Their researchers have found scant evidence that increasing restrictions have improved public safety, despite the high costs and severe regulatory barriers imposed on shooters in Australia.

Their grades also improved, doing mathematical and reading tasks that seemed outside their ability before.

Their floss heads also feature a lateral flexibility that enables improved control for the dental floss to hug the sides of the teeth and clean under the gum line without the danger of hurting the gums.

Their close proximity to the ear drum results in improved sound directionality and localization, reduced feedback, and improved high frequency gain.

Their greater weight ensures improved retention of track geometry especially when installed with continuous-welded rail.

Their most basic function is to act as an improved army unit, enabling players to roll eight-sided dice rather than the typical six-sided ones.

Their reports indicate that violence could be traced to the time of the Civil War, but that in the five year existence of the WBA, " the relations existing between employers and employees " had greatly improved.

Their conditions improved only after sympathetic British civilians collected enough money to supply them with the bare necessities for sustenance.

Their product had been endorsed by Good Housekeeping, the A.M.A., and the Veterinary Journal, among other repositories of higher wisdom, and before much longer if you didn't have a cake of their soap in the john, even your best friends would think you didn't bathe.

Their writings assume more than dramatic or patriotic interest because of their conviction that the struggle in which they were involved was neither selfish nor parochial but, rather, as Washington in his last wartime circular reminded his fellow countrymen, that `` with our fate will the destiny of unborn millions be involved ''.

Their President, Jefferson Davis, interpreted their Constitution to mean that it `` admits of no coerced association '', but this remained so doubtful that `` there were frequent demands that the right to secede be put into the Constitution ''.

Their writing, born of their experiments in marijuana and untrammeled sexuality, reflects the extremity of their existential alienation.

Their burgeoning popularity may be a result of the closing of the 52nd Street burlesque joints, but curiously enough their atmosphere is almost always familial -- neighborhood saloons with a bit of epidermis.

Their eyes betrayed too much of their emotions, she thought sadly.

Their locations in all parts of the United States, and their locations in the several kinds of educational and research institutions that are the principal homes of our intellectual and artistic strengths also are factors in the Trustees' minds.

Their two boys were `` well adjusted '' and, like their parents, always did the right thing at the right time and damn the consequences.

Their father, when he came back from those many business trips, just bumped their mother on the forehead with his lips and asked if anybody had thought to mix the martinis and put them in the electric icebox.

If you really insist on knowing their names, an excellent book on the North American species is Bumblebees And Their Ways by O. E. Plath.

Their appearance, next spring, coincides in an almost uncanny way with the flowering of their host plants.

Their own experience in the social system influences their work and attitudes as teachers.

Their affection for their college home has even caused President Dickey to comment on this `` place loyalty '' as something rather specially Hanoverian.

Their presence is not as frightening as the discontent which creates their opportunity.

Their names are Mantle and Maris, their team is the Yankees, and their threat is real.

Their direct descendants inherited not only their worldly fortunes, but also the mandate of their newfound power as spirits in the other half of the universe.

Their metabolic rate is low and as a result, their food and energy requirements are limited.

Their bodies writhe and they raise and lash their tails which makes it difficult for the predator to avoid contact with their poison-producing granular glands.

Their lack of eyes, a morphology not well-suited for swimming, and their fossils found in association with other benthic trilobites all suggest a benthic ( bottom-dwelling ) mode of life.

Their therapy consisted of constraint-induced movement therapy which resulted in improvements of their arm function.