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Inverts

QuestionAnswer
Why is it important to study inverts? indicators of pollutants and environmental stress, economic uses, base of food web, and disease/cures
The filter feeder species in this phylum have no symmetry, no nerves, muscles, mouth or digestive system, no true tissues/organs, they reproduce sexually & asexually, are sessile, and have skeletons made up of spicules or spongin Phylum Porifera
Examples of species from the phylum porifera include erect rope sponge, black-ball sponge, yellow tube sponge, and 5,000 other sponges
The anatomy of sponges include choanocytes/ collar cells (pump water into sponge), cilia, & phagocytosis
The opening / cavity of a porifera (sponge) is called spongocoel
Tiny pores on sponges that help bring in the water ostia
What kind of feeders are sponges? filter feeders
With no mouths sponges use this to create a flow and take in water Flagella
Water leaves a sponge via oscolum (exit)
What are some functions of sponges in the ecosystem? reef builders, symbiotic partners, food for predators, toxins for protection
How do porifera reproduce? asexually and sexually
What is involved in asexual reproduction of porifera? Budding, Gemmules, and sometimes regeneration occurs from broken pieces
What is involved in sexual reproduction of porifera? Hermaphrodites produce gametes
What are the three main classifications of sponges? Desmospongiae, Calcarea, Hexactinellida
Most marine sponges are ________________ Desmospongiae
Characteristics of desmospongiae? all freshwater sponges, leuconoid (complex), spongin & SiO2 spicules
Characteristics of calcarea? all asconoid (vase shaped) forms, mostly syconoids, no spongin, CaO3 spicules, shallow marine water
Characteristic of hexactinellida? found in deep sea, glass-like lattice work, SiO2 spicules
Where can hexactinellida be found? The deep sea/abyss.
Where can desmospongiae be found? All freshwater sponges are desmospongiae, and they are also commonly found in marine waters.
Where can calcarea be found? Shallow marine waters.
Created by: pshelly
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