Respiratory System

Front 1

Respiratory System

Back 1

includes the nose, pharynx, larynx, trachea, bronchi, and their smaller branches, and the lungs, which contain alveoli (terminal air sacs). Nose

Front 2

Nose

Back 2

the only externally visible part of the respiratory system. During breathing, air enters the nose by passing through the external nares, or nostrils. the interior of the nose consisted of the nasal cavity, divided by a midline nasal septum. the lateral walls of the nasal cavity are uneven owing to three mucosa-covered projections or lobes, called conchae, which greatly increase the surface are of the mucosa exposed to the air. The nasal cavity is separated from the oral cavity below by a partition, the palate. Anteriorly, where the palate is supported by bone, is the hard palate; the unsupported posterior part is the soft plate.

Front 3

Pharynx

Back 3

A muscular passage way about 13 cm (5 inches) long that vaguely resembles a shortly length red garden hose. It is continuous with the nasal cavity anteriorly via the internal nares. Air enters the superior portion, the nasopharynx and laryngopharynx to enter the larnyx below. The pharyngeal tonsil, often called adenoid, is located in the nasopharynx. the palatine tonsil are in the oropharynx at the end of the soft palate; The lingual tonsils are at the base of the tongue.

Front 4

Uvula

Back 4

a fleshy extension at the back of the soft palate that hangs above the throat.

Front 5

Larynx

Back 5

the hollow muscular organ forming an air passage to the lungs and holding the vocal cords in humans and other mammals; the voice box.

Front 6

Epiglottis

Back 6

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

Front 7

Glottis

Back 7

the part of the larynx consisting of the vocal cords and the slitlike opening between them. It affects voice modulation through expansion or contraction.

Front 8

Trachea

Back 8

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.

Front 9

Bronchii

Back 9

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

Front 10

Bronchioles

Back 10

any of the minute branches into which a bronchus divides.

Front 11

Lungs

Back 11

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.

Front 12

Mediastinum

Back 12

a membranous partition between two body cavities or two parts of an organ, especially that between the lungs.