Lesson 23 Terms

Question 1

Abdomen

Answer 1

the posterior segment of an arthropod

Question 2

Aedeagus

Answer 2

organ that allows males to secrete sperm

Question 3

Antennae

Answer 3

organs that touch, smell, and sometimes hear

Question 4

Book lungs

Answer 4

respiratory organs with many thin layers where air circulates and the exchange of gasses takes place—oxygen passes into a blood filled chamber

Question 5

Carapace

Answer 5

a single exoskeletal plate that cover the cephalothorax

Question 6

Chelicerae

Answer 6

a short pair of appendages used to capture and crush prey

Question 7

Chelipeds

Answer 7

claws on the first pair of legs used for grooming, fighting, and capturing prey

Question 8

Compound eyes

Answer 8

allow the animal to see in many directions at once

Question 9

Exoskeleton

Answer 9

hardened outer covering of the body

Question 10

Jointed appendages

Answer 10

Most distinguishing characteristics of arthropods. Structures such as a legs, wings, or antennae that extend from the body wall of an arthropod and enable them to move and grasp objects

Question 11

Labium

Answer 11

lower lip

Question 12

Mandibles

Answer 12

mouthparts of arthropods used to crush and tear apart food

Question 13

Maxillae

Answer 13

upper jaw; used to chew food

Question 14

Metamorphosis

Answer 14

change of form;

2 types - Complete and incomplete

Question 15

Molt

Answer 15

to shed hair, skin, or an outer layer periodically

Question 16

Ovipositor

Answer 16

organ that allows females to deposit eggs

Question 17

Pedipalps

Answer 17

used for sensing and feeding; located between chelicerae and the first pair of legs which may contain pincers

Question 18

Saprophytes

Answer 18

eat decaying leaves and plant matter

Question 19

Simple eyes

Answer 19

detect the presence of light

Question 20

Spermatophore

Answer 20

packet of sperm

Question 21

Spinnerets

Answer 21

structures located at the tip of the abdomen, used to spin silk

Question 22

Spiracles

Answer 22

small pores on each segment allowing air to enter the body

Question 23

Swimmerets

Answer 23

appendages used for swimming and reproduction, located on the abdomen

Question 24

Telson

Answer 24

fan shaped tail at the end of the body

Question 25

Thorax

Answer 25

the region between head and abdomen

Question 26

Trachea

Answer 26

delivers gasses throughout the body