1/20/2024 0 Comments Crawling cells that move through a sponge delivering food and oxygen is called what![]() ![]() mesohyl – jelly-like material separates 2 layers of cellsĬollar cells- Collar cells- w/ flagella beat water through the sponge Sponges have key characteristics of animals: Heterotrophic Multicellular A dults are sessile- but some species can move up to 4mm/day () –And sponge larvae have flagellaīasic Body plan of a Sponge Asymmetrical & Sessile Vocabulary of sponge parts: Osculum- Hollow cylinder shape, closed at bottom, opening at top called Choanocytes ( collar cells) – flagellated cells that draw water into the sponge through pores in the body wall called Ostia. Sponges The most primitive of the simplest animals: Sponges Phylum: Porifera - Invertebrate (no backbone) Asymmetrical No true tissues or organs All species -Aquatic SessileAdult is Sessile (do not move) Why are sponges considered animals? Early biologists thought they were plants! ![]() ![]() The Simplest Invertebrate Phyla are: -without a skeleton -without segmentation: Porifera (sponges) Cnidaria (jellyfish, hydras, sea anemones, Portuguese man-of-wars, corals) Platyhelminthes (flatworms, including planaria, flukes, and tapeworms) Nematoda (roundworms, including rotifers and nematodes) The Simplest Animals Sponges Jellyfish Flatworms Roundworms Many images from: 2 Presentation on theme: "The Simplest Animals Sponges Jellyfish Flatworms Roundworms Many images from: Presentation transcript: ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |