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13 Cards in this Set

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Metazoa

the new Animalia

Characteristics of Metazoa

Multicellular, eukaryotic, heterotropic, develop from an embryo, produce gametes, more than one type of non-reproductive cell, motile in at least 1 life stage

Multicellularity Advantage

Increased size, smaller surface area to volume, cells protected, cells cooperate, cells specialize

Epithelial 'Tissue'

This is squamous, thin, flat, at border; it is like saran wrap that covers other organs; however members of porifera have rudimentary this

Connective 'Tissue'

In poriferans this tissue consists of cells in a non-living matrix

Porifera

This word means "pore bearing," the members of this family are the first multicellular animals, they are filter feeders, they have radial or asymmetrical symmetry, they are organised on the cellular level

Tissues

Poriferans have no true ___.

Benthic

Poriferans are ___ creatures, meaning that they live on the bottom of an aquatic environment

Ostia

The name for the pore that move water into the body of the sponge

Spongeocoel

This is the central cavity of the sponge

Osculum

This is the area where the water flows out of the sponge

Spicules

These form the skeleton of poriferans, it is often made of CaCO3 or SiO2

Spongin

Another element of the sponge skeleton, members of Demospongiae will have this