The respiratory system includes the respiratory tract, the respiratory organs and air sacs.
How many air sacs are present in pigeon. Name them ?

The respiratory system includes the respiratory tract, the respiratory organs and air sacs. What type respiration is seen in pigeon ?

The respiratory system includes the respiratory tract, the respiratory organs and air sacs. What are the functions of air sacs ?

How many cells are found in an angiosperm embryo sac? Name them.

Identify the correct statements from the below about "Respiratory system of earthworm". (I) The earthworm has no special respiratory organs like lungs or gills. (II) Respiration takes place through the body wall. (III) Oxygen diffuses through, the skin into the blood. (IV) The skin is kept moist by mucous and coelomic fluid.

How many nuclei are found in an angiosperm embryo sac? Name them.

The amount of air that nmoves into the respiratory passage per minute is called…….

Name the respiratory organs of flatworm,earthworm, fish, prawn, cockroach and cat.

Name four different respiratory organs that you have come across in the animal kingdom. Give examples.