For particles with an aerodynamic diameter less than 1 µm, Brownian diffusion is a major way for deposition in airways where the bulk flow is very low or absent.

Epiglottis is a flap of cartilage located in the throat behind the tongue and in front of the larynx. 

It is a sensory receptor mainly found in the hypothalamus.

  Blood of Cockroach does not contain respiratory pigment.

Oxygenation of blood occurs in lungs

 Book-lungs are the respiratory organs of a scorpion.Each of these organs is found inside an open ventral abdominal, air-filled cavity (atrium) and connects with the surroundings through a small opening for the purpose of respiration.

Frogs use their skin to soak in the oxygen their bodies require. When they hibernate, they utilize the skin for any and all breathing. Damp skin is a must for subcutaneous gas exchange. If a frog's skin becomes dry, it will no longer be able to take in oxygen.

Vestibular folds are also known as false vocal chords. They are also called venticular folds. They are called false vocal cords because they are not involved in voice production.

It is a special organ of respiratory tract that is present in proximal region of trachea.

It is the inflammation of pleural sacs due to excessive pleural fluid.

At the level of the fifth thoracic vertebra, trachea divides to form a left and right primary bronchi.

It is the largest cartilage. It is broad and C-shaped in outline, with a V-shaped notch on the superior edge. There are two small elongated club-shaped nodules of elastic fibro cartilage which lie above and anterior to corniculate cartilage.

The cells which eliminate particles and microbes reaching the alveoli are called dust cells. These are also known as macrophages.

Breathing or pulmonary ventilation facilitates intake of atmospheric air and expulsion of alveolar air.

The movement of ribs and sternum facilitates the process of breathing.