Phylum Arthropoda

Question 1

it protects the body and provides attachment sites for muscles

Answer 1

exoskeleton

Question 2

hard chitinous impregnated with lime salts covers the body

Answer 2

cuticle

Question 3

It is secreted by a single layer of cells called the

Answer 3

epidermis

Question 4

anterior rigid portion, consists of segments 1 to XIII

Answer 4

cephalothorax

Question 5

posterior series of segments, include six segments and the telson

Answer 5

abdomen

Question 6

Regions of the Body (possess in eachbody region)

Answer 6

head, thorax, and abdomen

Question 7

convex dorsal plate

Answer 7

tergum

Question 8

ventral transverse bar

Answer 8

sternum

Question 9

plates projecting down sides

Answer 9

pleura

Question 10

base of the limb

Answer 10

epimera

Question 11

cuticular shield

Answer 11

carapace

Question 12

indentation on the carapace

Answer 12

cervical groove

Question 13

anterior pointed extension of the carapace

Answer 13

rostrum

Question 14

beneath the rostrum, with moving peduncle

Answer 14

eye

Question 15

ventral surface near the posterior end

Answer 15

mouth

Question 16

terminal extension/segment

Answer 16

telson

Question 17

variations of appendages

Answer 17

protopodite
endopodite
exopodite
antennules and antennae
mouth
thoracic region

Question 18

basal segment

Answer 18

protopodite

Question 19

inner branches

Answer 19

endopodite

Question 20

outer appendages

Answer 20

exopodite

Question 21

mandible and maxillae

Answer 21

mouth

Question 22

maxillipeds, pinchers/chelipeds, walking legs, swimmerets 9 beneath the abdomen

Answer 22

thoracic region

Question 23

kinds of appendages

Answer 23

foliaceous
biramous
uniramous

Question 24

ex. second maxilla - (expansion)

Answer 24

foliaceous

Question 25

ex. swimmerets (pass through a stage)

Answer 25

biramous

Question 26

walking legs (final)

Answer 26

uniramous

Question 27

The only appendages that all crustaceans have in common is

Answer 27

two pairs of antennae

Question 28

each segment of a crustacean possess

Answer 28

one pair of biramous appendages

Question 29

Crustacean biramous appendages have a basal or first portion referred to as the

Answer 29

protopod

Question 30

means the first part of the foot

Answer 30

protopodite

Question 31

A branch on the outside

Answer 31

exopod

Question 32

a branch on the inside

Answer 32

endopod

Question 33

Sometimes the protopod has additional outgrowths besides the exo- and endopodites. These outgrowths are called

Answer 33

epipods and endites

Question 34

Appendages with all of these outgrowths are called

Answer 34

phyllopodus appendages

Question 35

where food are ground up by the

Answer 35

ossicles

Question 36

collective term for chitinous ossicles for chewing

Answer 36

gastric mill

Question 37

in the lateral wall of cardiac chamber for storage of calcareous matter for exoskeleton hardening

Answer 37

gastrolith

Question 38

colorless liquid where absorbed food passes, for food transport

Answer 38

blood

Question 39

compact mass that supplies the eyes, antennules and antenane with nerves

Answer 39

brain

Question 40

ganglia and connective of ventral nerve

Answer 40

ventral nerve cord

Question 41

ganglia and connective of ventral nerve

Answer 41

eye

Question 42

large fine lines that divided the cornea in four sided areas

Answer 42

facets

Question 43

long visual rod in the external part of the facet

Answer 43

ommatidium

Question 44

outermost fastened to the coxopodite

Answer 44

podobranchiae

Question 45

innner double row

Answer 45

arthrobranchiae

Question 46

excretory organs, pair of large bodies - consists of bladder and a duct opening

Answer 46

green glands

Question 47

is the period during which calcium is resorbed from the old exoskeleton into the blood. The epidermis separates from the old exoskeleton, new setae form, and a new exoskeleton is secreted.

Answer 47

proecdysis/premolt

Question 48

the actual shedding of the old exoskeleton, takes place when the old exoskeleton splits along preformed lines. 

Answer 48

ecdysis

Question 49

is the stage in which the soft cuticle gradually hardens and becomes calcified. At the end of this stage the cuticle is complete

Answer 49

metecdysis

Question 50

is a period of variable duration, from a few days in small forms to a year or more in some of the large forms.

Answer 50

intermolt

Question 51

a stage where they do not molt again after passing through a series of molts.

Answer 51

terminal anecdysis

Question 52

are cyclic changes that approximate a day in length

Answer 52

circadian rhythms

Question 53

special type of cyclic rhythms in plantonic and pelagic crustaceans exhibits with cladocernas, copepods, euphausids and decapods

Answer 53

vertical migrations