invertebrate animal science

Question 1

an animal of a large group distinguished by the possession of a backbone or spinal column, including mammals, birds, reptiles, amphibians, and fishes.

Answer 1

Vertebrates

Question 2

an animal lacking a backbone, such as an arthropod, mollusk, annelid, coelenterate, etc. The invertebrates constitute an artificial division of the animal kingdom, comprising 95 percent of animal species and about 30 different phyla.

Answer 2

Invertebrates

Question 3

a person or thing that eats or uses something.

Answer 3

Consumer

Question 4

a structure containing a number of nerve cell bodies, typically linked by synapses, and often forming a swelling on a nerve fiber.

Answer 4

Ganglion

Question 5

the stomach or belly.

Answer 5

Gut

Question 6

the body cavity in metazoans, located between the intestinal canal and the body wall.

Answer 6

Coelom

Question 7

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

Answer 7

Bilateral Symmetry

Question 8

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

Answer 8

Radial Symmetry

Question 9

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

Answer 9

Asymmetry

Question 10

a primitive sedentary aquatic invertebrate with a soft porous body that is typically supported by a framework of fibers or calcareous or glassy spicules. Sponges draw in a current of water to extract nutrients and oxygen.

Answer 10

Sponges

Question 11

an aquatic invertebrate animal of the phylum Cnidaria, which comprises the coelenterates.

Answer 11

Cnidarians

Question 12

a worm of a phylum that includes the planarians together with the parasitic flukes and tapeworms. They are distinguished by having a simple flattened body that lacks blood vessels, and a digestive tract that, if present, has a single opening.

Answer 12

Flatworms

Question 13

a nematode, especially a parasitic one found in the intestines of mammals.

Answer 13

Roundworms

Question 14

an invertebrate of a large phylum that includes snails, slugs, mussels, and octopuses. They have a soft, unsegmented body and live in aquatic or damp habitats, and most kinds have an external calcareous shell.

Answer 14

Mollusks

Question 15

Open circulatory systems (evolved in crustaceans, insects, mollusks and other invertebrates) pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells. Blood is pumped by a heart into the body cavities, where tissues are surrounded by the blood.

Answer 15

Open circulatory system

Question 16

Vertebrates, and a few invertebrates, have a closed circulatory system. Closed circulatory systems have the blood closed at all times within vessels of different size and wall thickness. In this type of system, blood is pumped by a heart through vessels, and does not normally fill body cavities.

Answer 16

Closed circulatory system

Question 17

A large phylum that comprises the segmented worms, which include earthworms, lugworms, ragworms, and leeches. The two largest groups of trochozoans are the Mollusca and the Annelida (segmented worms).

Answer 17

Annelid worms