adenoid

(The adenoid, also known as a pharyngeal tonsil or nasopharyngeal tonsil, is a mass of lymphatic tissue situated posterior to the nasal cavity, in the roof of the nasopharynx, where the nose blends into the throat.)

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alveolus

(a small cavity, pit, or hollow, in particular- any of the many tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.)

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bronchus

(any of the major air passages of the lungs that diverge from the windpipe.)

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bronchus

(any of the major air passages of the lungs that diverge from the windpipe.)

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bronchiole

(any of the minute branches into which a bronchus divides)

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carbon dioxide

(a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is naturally present in air and is absorbed by plants in photosynthesis.)

diaphragm

(a dome-shaped, muscular partition separating the thorax from the abdomen in mammals. It plays a major role in breathing, as its contraction increases the volume of the thorax and so inflates the lungs.)

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epiglottis

(a flap of cartilage at the root of the tongue, which is depressed during swallowing to cover the opening of the windpipe.)

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larynx

(the hollow muscular organ forming an air passage to the lungs and holding the vocal cords; the voice box.)

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lobe

(a roundish and flattish part of something, typically each of two or more such parts divided by a fissure, and often projecting or hanging - such as each of the parts of the cerebrum of the brain, or ears)

mucus

(a slimy substance, typically not miscible with water, secreted by mucous membranes and glands for lubrication, protection, etc.)

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nose

(the part projecting above the mouth on the face of a person, containing the nostrils and used for breathing and smelling.)

nose

(the part projecting above the mouth on the face of a person, containing the nostrils and used for breathing and smelling.)

straight

(extending or moving uniformly in one direction only; without a curve or bend.)

oxygen

(a colorless, odorless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air.)

oxygen

(a colorless, odorless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air.)

pharynx

(the membrane-lined cavity behind the nose and mouth, connecting them to the esophagus.)

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pleura

(each of a pair of serous membranes lining the thorax and enveloping the lungs)

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lung; air

(each of the pair of organs situated within the rib cage, consisting of elastic sacs with branching passages into which air is drawn, so that oxygen can pass into the blood and carbon dioxide be removed. Lungs are characteristic of vertebrates other than fish, though similar structures are present in some other animal groups.)[image]

lung; air

(each of the pair of organs situated within the rib cage, consisting of elastic sacs with branching passages into which air is drawn, so that oxygen can pass into the blood and carbon dioxide be removed. Lungs are characteristic of vertebrates other than fish, though similar structures are present in some other animal groups.)

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lung; air

(each of the pair of organs situated within the rib cage, consisting of elastic sacs with branching passages into which air is drawn, so that oxygen can pass into the blood and carbon dioxide be removed. Lungs are characteristic of vertebrates other than fish, though similar structures are present in some other animal groups.)

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lung

(each of the pair of organs situated within the rib cage, consisting of elastic sacs with branching passages into which air is drawn, so that oxygen can pass into the blood and carbon dioxide be removed. Lungs are characteristic of vertebrates other than fish, though similar structures are present in some other animal groups.)

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pus

(a thick yellowish or greenish opaque liquid produced in infected tissue, consisting of dead white blood cells and bacteria with tissue debris and serum.)

sinus

(a cavity within a bone or other tissue, especially one in the bones of the face or skull connecting with the nasal cavities)

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sinus

(a cavity within a bone or other tissue, especially one in the bones of the face or skull connecting with the nasal cavities)

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septum; wall off

(a partition separating two chambers, such as that between the nostrils or the chambers of the heart.)

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breathe; breathing

(take air into the lungs and then expel it, especially as a regular physiological process.)

thorax; chest

(the part of the body between the neck and the abdomen, including the cavity enclosed by the ribs, breastbone, and dorsal vertebrae, and containing the chief organs of circulation and respiration; the chest.)

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tonsil

1. (either of two small masses of lymphoid tissue in the throat, one on each side of the root of the tongue.)
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trachea

(a large membranous tube reinforced by rings of cartilage, extending from the larynx to the bronchial tubes and conveying air to and from the lungs; the windpipe.)

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