Sponges do not have complex nervous, digestive or circulatory systems like humans. Instead, most rely on maintaining a constant water flow through their bodies to obtain food and oxygen and to remove wastes. ... Symbiotic cyanobacteria may form a third of the total mass of living tissue in some sponges, and … See more Sponges, the members of the phylum Porifera , are a basal animal clade as a sister of the diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through … See more Sponges are similar to other animals in that they are multicellular, heterotrophic, lack cell walls and produce sperm cells. Unlike other animals, they lack true tissues and See more Cell types A sponge's body is hollow and is held in shape by the mesohyl, a jelly-like substance made mainly of collagen and reinforced by a … See more Habitats Sponges are worldwide in their distribution, living in a wide range of ocean habitats, from the polar regions to the tropics. Most live in quiet, clear waters, because sediment stirred up by waves or currents would … See more The term sponge derives from the Ancient Greek word σπόγγος (spóngos 'sponge'). See more Sponges constitute the phylum Porifera, and have been defined as sessile metazoans (multicelled immobile animals) that have water intake and outlet openings connected by … See more Movement Although adult sponges are fundamentally sessile animals, some marine and freshwater species can move across the sea bed at speeds of 1–4 mm (0.039–0.157 in) per day, as a result of amoeba-like … See more WebWhile sponges do not exhibit true tissue-layer organization, they do have a number of functional “tissues” composed of different cell types specialized for distinct functions. For example, epithelial-like cells called pinacocytes form the outermost body, called a pinacoderm, that serves a protective function similar that of our epidermis ...
sponges Flashcards Quizlet
WebDec 11, 2015 · Spongin is a protein and it is secreted by cells called spongocytes. Although sponges have no muscle tissue and are sessile organisms, they do have muscle-like … imedia past papers aqa
Do sponges have tissues? - Answers
WebApr 2, 2024 · How many true tissue layers do sponges have? two tissue layers Another important consideration is whether tissues are present, and how many tissue types are … WebMay 30, 2008 · How many layers of tissue do Cnidarians and sponges have? Sponges do not have tissues while cnidarians have two tissue layers. Which knigdom can develop tissues? All animals except sponges. WebSponges are primarily marine, but around 150 species live in fresh water. Sponges have cellular-level organization, meaning that that their cells are specialized so that different cells perform different functions, but similar cells are not organized into tissues and bodies are a sort of loose aggregation of different kinds of cells. list of new amsterdam episodes