Lab 7 - Porifera & Cnidarians

Sponge phylum

Ponifera

Sponge cells

choanocytes

Sponge top hole

osculum

Support sponge body

spicules and spongin

Sponge central hole

spongocoel

Radial canal

internal pockets lined with collar cells and opening in the spongocoel with apopyles

Incurrent canals

External pockets where water is drawn in

dermal ostium

External openings on the sponge

Tube sponge phyla and genus

porifera, Grantia

Cnidarian specialized cell; contains______organelle

cnidocyte, nematocysts

Traits of cnidarians

diploblasic, radial symmetry, incomplete gut,

netlike array of neurons

nerve net

body types of cnidarians

polyp and medusae

body parts of polyp

pedal disc (foot), tentacles, mouth, body column

collection of _____ in a ______

polyps, colony

cnidaria larvae

planula

Cnidaria classes

Hydrozoa, Scyphozoa, Physalia

Genus in Hydrozoa

Obelia (polyp colony, small medusa), Hydra (solitary polyp), Gonionemus (kind of moon jellyish), Physalia (man o war)

Class Scyphozoa

True jellyfish, medusa stage dominates

Class Anthozoa

Polyp stage dominates, medusa is absent (sea anemones and corals)

Mesoderm-like ECM layer in Cnidarians

mesoglea

Endoderm of Cnidarians; central cavity

Gastrodermis; gastrovascular cavity

epidermis of cnidarians is made up of

epitheliomuscular cells

Gastrodermis is made up of

nutritive-muscular cells

Parts of Obelia colony

Hydranth (feeding “anemone”), gonangium (makes medusa buds), coenosarc (living stalk)

basal disc Cnidarians

adhesive foot on apex of solitary hydra polyp

Radial canal in Cnidarian

extend from mouth to edge of bell

Stalk that contains jellyfish mouth, connects to bell

manubrium

Location of Obellia medusa gonads

in outer edge of bell

Inner edge of jellyfish bell

Velum