From the pharynx, air passes into a chamber called the ______________ .

Earth worm and frogs breathe through their skin because of which the skin of both the organisms is 

During deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in the

The process of breakdown of glucose into pyruvate is known as

Lungs are situated inside the chest cavity, and they rest on a large muscular sheet called the ________________ .

During hibernation, the organism that respire through skin only is

Which of the following are correct ?

(a) Terrestrial organisms use atmospheric oxygen for respiration, which is absorbed by different organs in different animals.

(b) All the respiratory organs  in terrestrial organisms have a structure that decrease the surface area and is in contact with the oxygen rich atmosphere.

Gaseous exchange in plants take place through _______ and ________ .

Each human lungs contain _____________alveoli.

Which of the following are correct ?

(a) The respiratory organs in fish are the gills.

(b) Dolphins and whales come to the surface of sea water form time to time to breath in air.

(c) Human can survive under water because they do not possess any gills to make use of oxygen dissolved in water for breathing.