Compléter U5. Biology IIIVersion en ligne Complete the following sentences with the correct word par Irene Caro 1 asymmetrical false sponges true radial are sessile aquatic animals that mostly live in the sea . their are or have symmetry . they don't have tissue and organ s 2 sessile fragmentation fuse : fixed to one place and doesn't mov e 3 sessile fragmentation fuse : join together to form a single thin g 4 fuse fragmentation sessile : part of the organism breaks apar t 5 pores spongin spicules They have bodies covered with holer , or , that allow water to flux through them . this is where they get the name porifer a 6 pores spicules spongi they have an interna skeleton that protects them . sometimes it's form of rigid spines called , other times from flexible fibres that are called 7 choanocytes pinacocytes osculum central cavity spicule porocytes : large hole used to release water and waste substance s 8 porocytes central osculum cavity pinacocytes choanocytes : hollow spac e 9 choanocytes pinacocytes pinacocytes osculum porocytes central cavity : cells are sponge's external 10 osculum porocytes choanocytes pinacocytes central cavity : cells that cover the inner cavity and create a stream of water . they also filter foo d 11 choanocytes porocytes pnacocytes central cavity osculum : cells that form the pores which let water flow into the spong e 12 INTERACTION of subtance nutrition reproduction secretion materials : they don't have nervous system or muscles , so their responses are simple . most responses involve the 13 filter reproduction NUTRITION osculu porocytes enter choanocytes interaction spicules : sponges don't have distinct digestive , respiratory , and excretory systems . instead , they food particles out of the water that flows through them . create a stream of water that travels through the pores . the sponge takes in nutrients and oxygen dissolved in the water . carbon dioxide and other waste products leave the sponge through the 14 interaction fuse REPRODUCTION fragmentation sexually sessile asexuals nutrition . - sponges reproduce the produce gametes that form larvae when they together . - they can also reproduces though .
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