Respiratory system

{:("Phylum","Level of organisation","Digestive system","Respiratory system"),("Aschelminthes","A","Complete","Absent"),("Echinodermata","Organ system","B","Present"),("Platyhelminhes","Organ","Incomplete","C"),("Annelida","Organ system","Incomplete","D"):} Select the option with correct identification of A, B, C, and D.

Read the following four statement carefully. (i) Ventral respiratory group of neurons of medulla oblongata can cause both inspiration and expiration. (ii) The part of the respiratory system starting with the external nostrils up to the terminal bronchioles constitutes the respiratory or exchange part of the respiratory system. (iii) During swallowing epiglottis can be covered by a thin elastic cartilaginous flap called glottis to prevent the entry of food into the larynx. (iv) Binding of oxygen with haemoglobin in primarily related of oxygen with haemoglobin is primarily related to partial prssure of O_(2) . Which of the above two statement are correct ?

Which of these statements are fasle regarding the human respiratory regarding the human respiratory system ? (a) The nasal chamber opens into the pharynx . (b) Trachea, bronchus and initial bronchioles are supproted by complete cartilaginous rings. (c ) The branching network of bronchi, bronchioles and alveoli comprises the lungs. (d) Pleural fluid increase friction on the lung surface.

In neonate there is change in respiratory and circulatory system. The switch over is intiated by

When the respiratory substances are more than one then which respiratory substrates are not used

What are respiratory substrates? Name the most common respiratory substrate.

What are respiratory substrates? Name the most common respiratory substrate.

Arrange these respiratory substrates used in aerobic respiration in increase order of their respiratory quotients.

Respiratory trees are found in

Name the following : A respiratory substance