BRain liest for whoever does both thanks:D!

Task 2: The Circulatory system pumps blood and oxygen to all of the organs in your body to keep them working, The respiratory system takes in oxygen and the circulatory system takes that oxygen to all parts of the body. The circulatory system also takes nutrients from food that is digested by the digestive system to all parts of the body to keep them working as well.

Task 3: The Endocrine system is important to controlling the human body but for these reasons I believe that the nervous system is more important. I think that the Nervous system is more important to controlling functions and processes in the human body because without the nervous system messages from and to your brain can not be relayed. Without the nervous system you would not be able to move or feel pain when you have been injured.

organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.