simple invertebrate vocab

Question 1

Porifera

Answer 1

A phylum of aquatic invertebrate animals that comprises the sponges

Question 2

Cnidaria

Answer 2

an aquatic invertebrate animal of the phylum

Question 3

Annelida

Answer 3

the ringed worms or segmented worms, are a large phylum

Question 4

Hydroid

Answer 4

a coelenterate of an order that includes the hydras. They are distinguished by the dominance of the polyp phase.

Question 5

jellyfish

Answer 5

a free-swimming marine coelenterate with a jellylike bell- or saucer-shaped body that is typically transparent and has stinging tentacles around the edge.

Question 6

Platyhelminthes

Answer 6

a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates.

Question 7

Nematoda

Answer 7

large phylum of worms with slender, unsegmented, cylindrical bodies

Question 8

Pinworms

Answer 8

a small nematode worm that is an internal parasite of vertebrates.

Question 9

Tapeworms

Answer 9

a parasitic flatworm, the adult of which lives in the intestine of humans and other vertebrates. It has a long ribbonlike body with many segments that can become independent, and a small head bearing hooks and suckers.

Question 10

Bivalves

Answer 10

an aquatic mollusk that has a compressed body enclosed within a hinged shell, such as oysters, clams, mussels, and scallops.

Question 11

Gastropods

Answer 11

a snail, slug, or whelk.

Question 12

Coelomate

Answer 12

body cavity called a coelom with a complete lining called peritoneum derived from mesoderm

Question 13

Acoelomate

Answer 13

an invertebrate lacking a coelom

Question 14

Radial symmetry

Answer 14

symmetry around a central axis, as in a starfish or a tulip flower.

Question 15

Asymmetry

Answer 15

lack of equality or equivalence between parts or aspects of something; lack of symmetry.

Question 16

Bilateral symmetry

Answer 16

the property of being divisible into symmetrical halves on either side of a unique plane

Question 17

Tentacle

Answer 17

a slender flexible limb

Question 18

Cnidocyte

Answer 18

an explosive cell containing one giant secretory organelle or cnida

Question 19

Ectoderm

Answer 19

one of the three primary germ layers in the very early embryo.

Question 20

Endoderm

Answer 20

the innermost layer of cells or tissue of an embryo in early development, or the parts derived from this, which include the lining of the gut and associated structures.

Question 21

Ovary

Answer 21

a female reproductive organ in which ova or eggs are produced, present in humans and other vertebrates as a pair.

Question 22

Teste

Answer 22

produce and store sperm and are also the body’s main source of male hormones, such as testosterone.