Sponges, Cnidarians, Ctenophores, And Protostomes

Front 1

Parazoa

Back 1

Animals without true tissues

Front 2

Eumetazoa

Back 2

Animals with true tissues

Front 3

Poriferans

Back 3

The phylum of animals that includes sponges

Front 4

Collar cells

Back 4

Flagellate cells of sponges; strikingly similar to choanoflagellates

Front 5

Choanocytes

Back 5

Another name for collar cells

Front 6

Ostia

Back 6

Pores of a sponge

Front 7

Porocytes

Back 7

Tubelike cells that form the pores of a sponge

Front 8

Spongocoel

Back 8

Central cavity of a sponge

Front 9

Osculum

Back 9

Open end of a sponge

Front 10

Epidermal Cells

Back 10

Form the outer layer of the sponge and line the canals

Front 11

Mesohyl

Back 11

Gelatin-like layer between the outer and inner cell layers of the sponge body

Front 12

Spicules

Back 12

Slender skeletal spikes that support the mesohyl

Front 13

Amoeboid Cells

Back 13

Wander about in the mesohyl; secrete the spicules

Front 14

Spongin

Back 14

Makes up the fibrous part of the sponge skeleton; a form of collagen

Front 15

Hermaphrodites

Back 15

The same individual can produce both eggs and sperm

Front 16

Cnidarians

Back 16

The phylum that consists of jellyfish and corals

Front 17

Polyp

Back 17

Typically has a dorsal mouth surrounded by tentacles

Front 18

Medusa

Back 18

The mouth is located in the lower concave, or oral, surface; the convex upper surface is the aboral surface

Front 19

Cnidocytes

Back 19

Specialized cells that contain stinging organelles

Front 20

Nematocysts

Back 20

Stinging "thread capsules"

Front 21

Gastrovascular Cavity

Back 21

Where digestion takes place

Front 22

Gastrodermis

Back 22

Lines the gastrovascular cavity and functions in digestion

Front 23

Mesoglea

Back 23

A thick, jellylike, mainly acellular layer which separates the ectoderm and gastrodermis

Front 24

Nerve Nets

Back 24

Connect sensory cells in the body wall to contractile cells and gland cells

Front 25

Hydrostatic Skeleton

Back 25

Contracting muscles push against a tube of fluid

Front 26

Hydrozoans

Back 26

Include hydras and hydroids, such as Obelia and Portuguese man-of-war.

Front 27

Scyphozoans

Back 27

Jellyfish; medusa is the dominant form

Front 28

Cubozoans

Back 28

Box jellyfish

Front 29

Anthozoans

Back 29

Include sea anemones and corals; either individual or colonial polyps

Front 30

Planula

Back 30

A small, ciliated larva of anthozoans

Front 31

Coral Bleaching

Back 31

The stress-induced loss of the colorful symbiotic algae that inhabit coral cells

Front 32

Ctenophores

Back 32

Comb Jellies