An animal whose gut has only one opening has a gastrovasuclar cavity. A Jellyfish is an example of an animal with a gastrovasuclar cavity.
Octopus
Three Gut Records ended in 2005.
True
An incomplete gut only has 1 opening. Basically if something has an incomplete gut, it has no anus, and all food that it takes in must either be completely digested, or re-excreted through the mouth.
A tube gut has one opening. The mouth while serving as the beginning of digestion also serve as the anus and eliminates waste.
A) Only one opening: they expel undigested material through the mouth.
An incomplete gut only has 1 opening. Basically if something has an incomplete gut, it has no anus, and all food that it takes in must either be completely digested, or re-excreted through the mouth.
A urethral opening is the opening of the end of the penis to comes out the sperm cell and the bladder. =)
A cnidarian has an incomplete gut with just one opening. BTW Those who said that "How many openings does cnidaria have?" and "How many opening does an earthworm have" are the same question are idiots. An earthworm in an annelid, or a member of phylum Annelida. Cnidarians are in an entirely different and less developed phylum, that is, phylum Cnidaria. So there. STAY IN SCHOOL!
An incomplete digestive system has only one opening by which food goes in same opening where waste comes out. therefore, water goes in specialized cells called choanocytes to filter out tha food particles
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