buddy, a turtles gestation system is a bit longer then a week.. i'll explain!!! Pulmonary surfactant (PS) is a complex mixture of phospholipids, neutral lipids and proteins that lines the inner surface of the lung. Here, it modulates surface tension thereby increasing lung compliance and preventing the transudation of fluid. In mammals, the PS system develops towards the end of gestation, characterized by an increase in the saturation of phospholipids in lung washings and the appearance of surfactant proteins in amniotic fluid. Birth, the transition from in utero to the external environment, is a rapid process. At this time, the PS system is important in opening and clearing the lung of fluid in order to initiate pulmonary ventilation. In oviparous vertebrates, escape from an egg can be a long and exhausting process. The young commence pulmonary ventilation and hatching by 'pipping' through the eggshell, where they remain for some time, presumably clearing their lungs. This paper relates changes in the development of the pulmonary surfactant system within the non-mammalian amniotes in response to birth strategy, lung morphology and phylogeny in order to determine the conservatism of this developmental process. Total phospholipid (PL), disaturated phospholipid (DSP) and cholesterol (Chol) were quantified from lung washings of embryonic and hatchling chickens, bearded dragons (oviparous), sleepy lizards (viviparous), snapping turtles and green sea turtles throughout the final stages of incubation and gestation. In all cases, the pattern of development of the pulmonary surfactant lipids was consistent with that of mammals. PL and DSP increased throughout the latter stages of development and Chol was differentially regulated from the PLs. Maximal secretion of both PL and DSP occurred at 'pipping' in oviparous reptiles, coincident with the onset of airbreathing. Similarly, the amount of DSP relative to total PL was maximal immediately after the initiation of airbreathing in chickens. The relative timing of the appearance of the lipids differed between groups. In the oviparous lizard, surfactant lipids were released over a relatively shorter time than that of the sleepy lizard, turtles, birds and mammals. Thus, despite temporal differences and vastly different lung morphologies, birth strategies and phylogenies, the overall development and maturation of the PS system is highly conserved amongst the amniotes.
they wanted to kick me out and send me sumwhere harsher but my ma pulled me out.. i think its cause i was a bit of a naughty shit.. thank goodness 4 mom's!!
h i like those pictures man, especially the one of me dropping in on you he he he... ay bru bad luck for getting cuffed with the green stuff by my aunt! nans said to beej that you such a fantastic young chap, wat a load of bullshit!!!! so dont worry bout her ok cuzzy..
your board will be super flexy and bend way too much if you've snapped your stringer! checked that photo justnow its pretty cool! howz the surf been at home, haven't had much cos i've gotta rite fucken tests. later dude
that sux bad dude...oh well like they put it shit happens!surf between bronze and main beach here at umh!was pretty sick and fun!surfd this morn got a couple goodies then the wind picked up!lakka dude beware of the croaking water rabbit! hopefully we get some wave in the morro!later norm
puku dude whats up with u and these mythical creatures ur always inventing!its like the western australian sweating goat??i mean come on...is that what they teach u at college?well then theyve done ok!comic relief is a great part of life as we know it!did u surf this long w/end?tues was pretty fun!later dude
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