Circulatory system is absent in

Open circulatory system is present in :-

Open circulatory system is present in ?

Open circulatory system is present in :-

Circulatory system is present in

Give reasons for the following. 1 . Respiratory and circulatory system are absent in parasitic platyhelminthes and Aschelminthes. 2. Arthropods are the most successful invertebrate. 3. Body of endoparasites are covered with cuticle.

Open circulatory system in present in

Circulatory system in birds is

Closed circulatory system present in

Closed circulatory system present in