incomplete= cniderians and platyhelminthes
complete = every other metazoan. e.g. nematoda, mammals, etc
well first of all, DOES not do, and no they have a complete digestive system, which mean they have both a mouth and anus that are seperate
The first animal phylum to have a circulatory system was the Annelida phylum, specifically the earthworm. Annelids have a closed circulatory system composed of blood vessels that transport nutrients and oxygen throughout the body.
mouth
the answer is ingestion.
mouth
It does not take a long time, the mouth is the first part of the digestive system.
when one soldier got a shoot in his stomach he had no connection with his intestine so the Dr William treated him and also work on digestive system and search it that how food gets in our body and where
Amylase is the first enzyme to mix with food in the digestive system. It is present in the saliva and help in the digestion of starch.
The first task of the digestive system is to break down food into a fine pulp (mechanical digestion). When the food is physically broken down, digestive chemicals break the food down into small molecules (chemical digestion). The mouth is the organ in which the process of digestion begins.(Google)
No, the highest level is kingdom.
The first of the two functions of the digestive system is to break down nutrients. The second function is the absorption of nutrients.
learn to spell digestive first and then you will receive an answer.