Breathing and Exchange of Gases Test - 5

Persons with snoring habit suffer from temporary closure of respiratory tract. It results in apnoea and sleep breaks.
 

The muscles extend from the tubercles of the ribs behind, to the cartilages of the ribs in front, where they end in thin membranes. These muscles work in unison during inhalation. The internal intercostal muscles relax while the external muscles contract, causing the expansion of the chest cavity and an influx of air into the lungs.
 

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

It is the maximum extra volume of air that can be inspired after a normal tidal inspiration.
 

It is the inspiratory capacity of lungs.

Blood of Cockroach does not contain respiratory pigment. The blood in cockroaches is called hemolymph. Hemolymph is colourless because there are no blood cells or respiratory pigment.

Oxygenation of blood occurs in lungs.The pulmonary arteries carry deoxygenated blood to the lungs, where they release carbon dioxide and pick up oxygen during respiration.

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.

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

During hibernation, cutaneous respiration occurs in the frog, i.e. it respires through its moist skin or integument. The skin is permeable to respiratory gases and carries oxygen to the body cells.