invertebrate vocab

Question 1

vertebrates

Answer 1

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

Question 2

Invertebrates

Answer 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.

Question 3

Consumer

Answer 3

a person or thing that eats or uses something.

Question 4

Ganglion

Answer 4

an abnormal benign swelling on a tendon sheath.

Question 5

Gut

Answer 5

the stomach or belly

Question 6

Coelom

Answer 6

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

Question 7

Bilateral Symmetry

Answer 7

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

Question 8

Radial Symmetry

Answer 8

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

Question 9

Asymmetry

Answer 9

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

Question 10

Sponges

Answer 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.

Question 11

Cnidarians

Answer 11

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

Question 12

Flatworms

Answer 12

a worm of a phylum that includes the planarians together with the parasitic flukes and tapeworms.

Question 13

Roundworms

Answer 13

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

Question 14

Mollusks

Answer 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.

Question 15

Open circulatory system

Answer 15

a fluid in a cavity called the hemocoel bathes the organs directly with oxygen and nutrients and there is no distinction between blood and interstitial fluid; this combined fluid is called hemolymph or haemolymph.

Question 16

Closed circulatory system

Answer 16

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.

Question 17

Annelid worms

Answer 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).

Question 18

Segment

Answer 18

each of the parts into which something is or may be divided.

Question 19

Exoskeleton

Answer 19

a rigid external covering for the body in some invertebrate animals, especially arthropods, providing both support and protection.

Question 20

Compound eye

Answer 20

an eye consisting of an array of numerous small visual units, as found in insects and crustaceans.

Question 21

Antenna

Answer 21

either of a pair of long, thin sensory appendages on the heads of insects, crustaceans, and some other arthropods.

Question 22

Metamorphosis

Answer 22

(in an insect or amphibian) the process of transformation from an immature form to an adult form in two or more distinct stages.

Question 23

Endoskeleton

Answer 23

an internal skeleton, such as the bony or cartilaginous skeleton of vertebrates.

Question 24

Water vascular system

Answer 24

a network of water vessels in the body, the tube feet being operated by hydraulic pressure within the vessels.