Do all animals contain a circulatory system
Do all animals contain a circulatory system?
Expert
Not all animals contain a circulatory system. Poriferans, platyhelminthes, cnidarians, and nematodes (in such there are pseudocoelom fluid however no vessels) are avascular animals. Echinoderms do not encompass true circulatory systems either.
Explain how do the muscles of legs and of feet contribute to the venous return?
The problem is not that the technology-based Knowledge Management is wrong; it is necessary for acquiring and retaining information. The problem is that it usually does not go far enough; it so not sufficient. Too often, as the accompanying application example notes, the people behind the IT syst
Name the human diseases caused by the platyhelminthes?
Which disease is caused by the deficiency of the dietary iodine?
Write down the constitution of cartilaginous matrix?
State the term vaccine? Answer: This is a preparation of antigenic material employed to persuade immunity against pathogens.
Define mineral salts? Where in living beings can mineral salts are found?
Write down the functional divisions of nervous system?
Why in cake and bread manufacture, alcoholic fermenting organisms are employed and not lactic fermenting organisms?
Write down the protective structures of central nervous system present in the vertebrates?
18,76,764
1932715 Asked
3,689
Active Tutors
1449803
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!