He looked around for a chimney from which no smoke issued, and having reached it, he disappeared through the orifice without being seen by any one.

The proportional width of the gape of mouth, the proportional length of the eyelids, of the orifice of the nostrils, of the tongue (not always in strict correlation with the length of beak), the size of the crop and of the upper part of the oesophagus; the development and abortion of the oil-gland; the number of the primary wing and caudal feathers; the relative length of the wing and tail to each other and to the body; the relative length of the leg and foot; the number of scutellae on the toes, the development of skin between the toes, are all points of structure which are variable.

We can thus, as I infer from Professor Owen's interesting description of these parts, understand the strange fact that every particle of food and drink which we swallow has to pass over the orifice of the trachea, with some risk of falling into the lungs, notwithstanding the beautiful contrivance by which the glottis is closed.

They consist of a gelatinous material enclosed in a delicate membrane, the whole or part of which is furnished with short vibrating hairs (called cilia), by means of which the animalcules swim through the water or convey the minute particles of their food to the orifice of the mouth.

But when the disease was more stubborn and violent, he let in the muzzle while the bellows were full of wind, which he discharged into the body of the patient; then withdrew the instrument to replenish it, clapping his thumb strongly against the orifice of then fundament; and this being repeated three or four times, the adventitious wind would rush out, bringing the noxious along with it, (like water put into a pump), and the patient recovered.

Their next business is from herbs, minerals, gums, oils, shells, salts, juices, sea-weed, excrements, barks of trees, serpents, toads, frogs, spiders, dead men’s flesh and bones, birds, beasts, and fishes, to form a composition, for smell and taste, the most abominable, nauseous, and detestable, they can possibly contrive, which the stomach immediately rejects with loathing, and this they call a vomit; or else, from the same store-house, with some other poisonous additions, they command us to take in at the orifice above or below (just as the physician then happens to be disposed) a medicine equally annoying and disgustful to the bowels; which, relaxing the belly, drives down all before it; and this they call a purge, or a clyster.

For nature (as the physicians allege) having intended the superior anterior orifice only for the intromission of solids and liquids, and the inferior posterior for ejection, these artists ingeniously considering that in all diseases nature is forced out of her seat, therefore, to replace her in it, the body must be treated in a manner directly contrary, by interchanging the use of each orifice; forcing solids and liquids in at the anus, and making evacuations at the mouth.

These included a relatively shallow orifice, most likely caused by a rondel dagger and a scooping depression to the skull, inflicted by a bladed weapon, most probably a sword. Additionally, the bottom of the skull presented a gaping hole, where a halberd had cut away and entered it.

Other systems involve liquid going through an orifice, expanding from a capillary, or sucked up from a surface into column by a vacuum.

Here the so-called Stirling-type single-orifice pulse-tube refrigerator will be treated operating with an ideal gas (helium) as the working fluid.

Figure 1 represents the Stirling-type single-orifice Pulse-Tube Refrigerator (PTR).

A gas element that flows into the tube does so when the pressure in the tube is low (it is sucked into the tube via X3 coming from the orifice and the buffer).

However, a pulse-tube refrigerator is not perfectly reversible due to the presence of the orifice, which has flow resistance.

The modern PTR was invented by Mikulin by introducing orifice in Basic pulse tube in 1984.

Flies prefer to deposit their eggs in any available orifice on the body such as the eyes, ears, nose, anus and mouth.

Three of the trainees (Oink, Oracle and Orifice) are only pictured in a single panel and do not appear with the team.