When infants are taught to sign, parents are able to converse with them at a developmental stage when they are not yet capable of producing vocal speech, which requires fine control of both breathing and the vocal tract.

Cetaceans ' blowholes have evolved to a position at the top of the head, simplifying breathing in sometimes rough seas.

* Protect vital signs by monitoring ABCs, or Airway, Breathing, and Circulation ; that is, if the person is thought to be at risk for severe respiratory depression, consider an endotracheal tube to protect the airway and assist with breathing.

Nonetheless, there are people in the diving community who insist that they feel reduced narcotic effects at depths breathing nitrox.

His landing at Heirkte ( near Panormus ) drew the Romans away to defend that port city and resupply point and gave Drepana some breathing room.

Low partial pressure of atmospheric oxygen such as found at high altitude or by reduced replacement of oxygen in the breathing mix.

A helium-oxygen breathing gas is often used by deep-sea divers at depths of seawater over 55 m ( 180 ft ) to keep the diver from experiencing oxygen toxemia, the lethal effect of high-pressure oxygen, and nitrogen narcosis, the distracting narcotic effect of the nitrogen in air beyond this partial-pressure threshold.

There are two schools of thought with respect to the appropriate breathing technique during the rowing motion: Full lungs at the catch and empty lungs at the catch.

A scuba set, acronym for self-contained underwater breathing apparatus, is any breathing set which is carried entirely by an underwater diver and provides the diver with breathing gas at the ambient pressure.

Gas in the breathing circuit is at ambient pressure, and stored gas is provided through regulators or injectors, dependent on design.

Constant flow scuba sets do not have a demand regulator ; the breathing gas flows at a constant rate, unless the diver switches it on and off by hand.

This type of set consists of one or more diving cylinders containing breathing gas at high pressure, typically, connected to a diving regulator.

The regulator supplies the diver with as much of the gas as needed, at a pressure suitable for breathing at the depth of the diver.

An open circuit diver whose breathing rate at the surface ( atmospheric pressure ) is 15 litres per minute will consume 3 x 15 = 45 litres of gas per minute at 20 metres.

* snorkeling-a form of free-diving where the diver's mouth and nose can remain underwater when breathing, because the diver is able to breathe at the surface through a short tube known as a snorkel.

* Liquid breathing-so far, in the real world, liquid breathing for humans is only laboratory experiments, and ( one lung at a time ) medical treatment.

In technical diving, the diver may carry different equipment for different phases of the dive ; some breathing gas mixes may only be used at depth, such as trimix and others, such as pure oxygen, which only may be used during decompression stops in shallow water.

* No known air breathing engine is capable of operating at orbital speed within the atmosphere ( for example hydrogen fueled scramjets seem to have a top speed of about Mach 17 ).

The lower density of helium reduces breathing resistance at depth.

Retaining nitrogen in trimix can contribute to the prevention of High Pressure Nervous Syndrome, a problem that can occur when breathing heliox at depths beyond about.

Atmospheric pressure decreases as altitude increases, making effective breathing more difficult at higher altitudes.

The combination of high fuel efficiency and low mass engines means that a single stage to orbit approach for Skylon can be employed, with air breathing to mach 5. 14 + at 28. 5 km altitude, and with the vehicle reaching orbit with more payload mass per take-off mass than just about any non-nuclear launch vehicle ever proposed.

Aviators are trained in pressure-demand breathing in altitude chambers.

The cannula provides extra oxygen to compensate for the lower oxygen content available for breathing at the low ambient air pressures of high altitude, preventing hypoxia.

Hyperpnea or hyperpnoea is increased depth of breathing when required to meet metabolic demand of body tissues, such as during or following exercise, or when the body lacks oxygen ( hypoxia ), for instance in high altitude or as a result of anemia.

Partial-pressure suits work by providing mechanical counter-pressure to assist breathing at altitude.

James Henry of the University of Southern California devised a partial pressure suit using an oxygen mask to provide pressurised oxygen, with gas pressure also inflating rubber tubes called capstans to tighten the suit and provide sufficient mechanical counterpressure to just balance the breathing pressure necessary to prevent hypoxia at a particular altitude.

The peak is quite high at 4460 m ( 14635 ft ), so anyone from low altitude will notice the effects of altitude including heavier breathing.

They were both breathing heavily, out cold, and Shayne didn't think either of them had recognized him or could describe him.

In the polytonic orthography of Greek, alpha, like other vowel letters, can occur with several diacritic marks: any of three accent symbols (), and either of two breathing marks (), as well as combinations of these.

A scientific study of the benefits of entrained breathing technique in relatively fit, but untrained rowers did not show any physiological or psychological benefit to either technique.

), music warm-up ( generally consisting of breathing exercises, scales, technical exercises, chorales, and tuning ), basics ( simple marching in a block to practice proper technique ), and sectionals ( in which either staff or band members designated section leaders rehearse individual sections ).

If either the sump clearing valve sticks open or the top float valve sticks closed, a snorkel is rendered useless as a breathing aid and the swimmer is forced to fall back on alternative surface breathing methods.

In medicine, a " do not resuscitate " or " dnr ", sometimes called a " No Code ", is a legal order written either in the hospital or on a legal form to respect the wishes of a patient to not undergo CPR or advanced cardiac life support ( ACLS ) if their heart were to stop or they were to stop breathing.

Brain dead means the donor must have received an injury ( either traumatic or pathological ) to the part of the brain that controls heartbeat and breathing.

" Other definitions describe it as " difficulty in breathing ", " disordered or inadequate breathing ", " uncomfortable awareness of breathing ", and as the experience of " breathlessness " ( which may be either acute or chronic ).

* Surface supplied diving equipment may incorporate rebreather technology either as a gas reclaim system, where the surface supplied breathing gas is returned and scrubbed at the surface, or as a self contained diver bailout system.

CPAP requires the nighttime use of a machine that delivers a continuous positive pressure to the airways and preventing the collapse of soft tissues in the throat during breathing ; it is administered through a mask on either the mouth and nose together, or if that is not tolerated on the nose only ( nasal CPAP ).

The core Buteyko exercises involve breath control ; consciously reducing either breathing rate or breathing volume.

Its reputed magical abilities include turning people to stone or killing them by either looking at them —" the death-darting eye of Cockatrice "— touching them, or sometimes breathing on them.

Most general anaesthetics today are induced either with a needle, by intravenous injection, or by breathing a volatile anaesthetic through an anaesthetic circuit ( inhalational induction ).

Other artificial gases, either pure gases or mixtures of gases, are used in breathing equipment and enclosed habitats such as SCUBA equipment, surface supplied diving equipment, recompression chambers, submarines, space suits, spacecraft, medical life support and first aid equipment, and anaesthetic machines.

Examples might include: ( 1 ) Rather than talking about the client's critical parent, a Gestalt therapist might ask the client to imagine the parent is present, or that the therapist is the parent, and talk to that parent directly ; ( 2 ) If a client is struggling with how to be assertive, a Gestalt therapist could either ( a ) have the client say some assertive things to the therapist or members of a therapy group, or ( b ) give a talk about how one should never be assertive ; ( 3 ) A Gestalt therapist might notice something about the non-verbal behavior or tone of voice of the client ; then the therapist might have the client exaggerate the non-verbal behavior and pay attention to that experience ; ( 4 ) A Gestalt therapist might work with the breathing or posture of the client, and direct awareness to changes that might happen when the client talks about different content.

Surface supplied diving refers to divers using equipment supplied with breathing gas using a diver's umbilical from the surface, either from the shore or from a diving support vessel sometimes indirectly via a diving bell.

The essential aspect of surface supplied diving is that breathing gas is supplied from the surface, either from a specialized diving compressor, high-pressure cylinders, or both.

The demand valves of these masks can be unclipped on the surface to allow breathing of atmospheric air, and can also be removed underwater to clip in a secondaty supply carried either by the diver of by a buddy carrying compatible equipment.

The diver's breathing gas can is pumped down from either high pressure tanks or through a gas compressor.

A third technology is the " Wet Sub ", which refers to a vehicle that may or may not be enclosed, but in either case water floods the interior so SCUBA equipment is used to facilitate breathing.

The drawover vaporiser may be mounted either way round, and may be used in circuits where re-breathing takes place, or inside the circle breathing attachment.