what is the decubitus position?
400807
Decubitus simply means: Act of lying down\n\ncould be dorsal=on back, ventral= on stomach, lateral=on sides
269386
Tightening the muscles before you get into the pose to inhibit air from getting in could help. In such a pose when you're open like that, air can leak in, and then when you get out of the position your muscles close up again, thus pushing out the air that's been accumulated.\n\nI hope you know which muscles I'm talking about.
905922
a snap from the center\nb
45731
when there is a low pressure system that brings all the air towards it
227187
The bar lowers the performer's center of gravity by placing some of the total mass of the performer and the bar below the level of their feet.  \n\nWith a lower center of gravity, it is easer to remain upright and balanced on the wire.
588366
sit with your legs slanted to the side with closed legs
141020
On my side, holding a pillow. Always. With one leg propped up - and it is better for my back. A physical therapist taught me the position after I broke my tailbone in a riding accident.
600834
I am a little puzzled here... The ONE true position is that the woman stand on her head, legs held apart by her partner, while being brutalized by the male who is standing on one foot, the other foot being held at a 90 degree angle to the side. All other positions are false. This true postion lost favor during the  1870's when missionaries went about the world making converts here and there...they converted people from the one true position to a more saintly missionary style which has gained popularity in later years. But I am glad you asked, for the True position deserves a comeback.
131156
The missionary position is probably the most common human s-e-x position.\n\nIn the missionary position:\n\nThe woman lies on her back, with her legs spread either flat (horizontally on the same surface as her back), drawn up towards her chest, or wrapped around the man. She can wrap both or just one leg around him, and on four different levels: resting on the back of his upper shins, around his thighs, around his buttocks/back or over his shoulders. Generally, the higher she lifts her legs, the deeper the penetration. The man lies on his stomach on top of the woman, with head and feet aligned, his legs between her legs, and his groin at the same level as hers to facilitate penetration. \nIt is said that the name "missionary position" arose because this s-e-x position was supposed to have been taught by Christian missionaries as the only "proper" s-e-x position; this story is apocryphal and probably false, since it is doubtful that Christian missionaries would explicitly teach sex positions to proselytes. The term is believed to have originated sometime between 1945 and 1965.
183912
Straight up in the air :)\nStand back
417764
It's a question of the relative amounts of muscle and fat, together with the density of your bones. Basically, if your overall body density (mass/volume) is >1 you will sink, if it's <1 you will float.\n\nThe air in your lungs *does* make a difference, since taking a deep breath both expands your volume, and increases the amount of low-density stuff in that volume. If I have a lungful of air, I can just about float; breathe out, and I sink.
64883
Up or away from the center of gravity.
80144
Center of gravity of the displaced liquid is the center of bouyancy. The (resultant) weight of the vessel acts at the center of gravity(downwards) and the (resultant) bouyant force acts at the center of bouyancy upwards.\n\nIt is better to have the center of gravity lower than the center of boyancy. for stabality. The lower it is the more stable.\n\nThis is because, if the vessel is tilted, the weight and the bouyant force make a couple. This can be against the tilt or with the tilt. If center of bouyancy is lower than center of gravity, it will tilt more. And vice versa.\n\n YOu can find this out by drawing small diagram of the forces.\n\nAlso you can try this. \nTake a pencil. \nhold it vertical but little tilted. \nnow assume, the bottom end is center of bouyancy and top end is center of gravity.\n\nso, push up form the bottom and push down form the top. You will see that the pencil becomes horizontal. i.e you ship sinks.\n\nIf you assume the opposite - take the top to be the center of bouyancy. Pull the top up and the bottom down. The pencil straightens. YOur ship stabalises.
707055
We're taught to never hold our breath on ascent, no matter if it's an out of air emergency ascent situation or a normal ascent to the surface. The last breath we take in, at depth , grows in volume as we ascend. If we didn't constantly breathe with that all important exhalation, air in the aveoli (air sacs) of our lungs would grow in volume to the point they popped. You now get to drown in your own blood. \n By never holding out breath, we keep the pressure differential down to a minimum between ambient and internal.\n As for taking a deep breath before going down, it doesn't matter. We breathe at a normal rate, just like you are now and as long as we're not over exerting ourselves, that really doesn't change.\n\n Lol, diver dude, some really far out answers in there,eh?
351534
If your talking about the pleural memebrane then it is situated between the lungs and ribs.....
832693
l'angle de 35° par rapport à celui de 45 favorise un meilleur plané du javelot par une pente plus douce. d'autre part au niveau anatomique  ou plutôt biomécanique un lancer à 45° efficace nécessiterait trop de contrainte en terme de position et par conséquent ne permettrait pas une bonne production de la force musculaire
227115
air is moved into the lungs