Phylum Anthropoda Flashcards Preview

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Flashcards in Phylum Anthropoda Deck (80):
1

What is the largest phylum in animal kingdom

Anthropods

2

Largest phylum
Bilateral symmetry
Jointed appendages
Sophisticated sense organs
Exoskeleton

Characteristics of crustaceans

3

What are Anthropods skeletons made of?

Chitin

4

Can be tough or soft and flexible
Relatively impermeable to water
Flexible enough in joints to allow movement

Anthropod skeletons

5

What are the exoskeleton drawbacks?

Relatively heavy and it doesn't grow with the animal so the animal must molt

6

Ecdysis

Molting

7

What happens during Ecdysis?

When the exoskeleton is ready, the animal contracts muscles and takes in air and water.

Animal swells until old exoskeleton splits usually along back

8

What is Ecdysis controlled and initiated by?

Controlled by hormones produced in the head
Initiated by changes in the environment

9

What are the 3 sections of the crustacean?

Head
Thorax
Abdomen

10

Sometimes the head and thorax fuse to form

Cephalothorax

11

How many pairs of walking legs?

5

12

What are the shorter antennas called?

Antennules

13

Anthropods have extensive cephalization...

Compound eyes
Sophisticated brain
Antennae detect changes

14

How do Anthropods respirate

Gills, tracheal system, book gills

15

What does the Anthropod nervous system contain?

Double ventral nerve cord
Anterior brain
Ganglia (control center for body)

16

Anthropods have what kind of circulatory system?

Open

17

Body fluid is called

Hemolymph

18

Anthropods have complete digestive tract that includes

Mouth, stomach, intestine, anus, and mandible

19

Mandibles open from

Side to side

20

What is the reproductive system like in Anthropods?

They are dioecious, they have internal fertilization, ostracods and Branchiopoda reproduce by parthenogenesis (eggs develop without sperm)

21

Subphylum Crustacea includes

Crabs, lobsters, etc.

22

Marine, freshwater and terrestrial
Fused cephalothorax
2 pairs of antennae

Crustacea

23

What are the classes within Crustacea?

Maxillapoda
Malacostraca

24

Barnacles and Copepods

Maxillapoda

25

Crabs, lobster, shrimp, krill

Malacostraca

26

Have flexible body plan that allows them to live in all biomes.

Anthropods

27

What are Copepods

Microscopic planktonic organisms
Important part of food web

28

Sessile
Cause problems to ships by increasing drag
Filter feeders

Barnacles

29

Largest group of crustaceans
Usually 8 legs, first 2 used for feeding
2 chambered stomach

Malacostraca

30

Crabs lobster shrimp

Decapoda

31

5 pairs of walking legs
First pair is modified to form chelipeds which catch prey and defend animal

Decapoda

32

Shrimp like animals that are filter feeders and feed on zooplankton
Most species are bioluminescent

Krill

33

Scavengers
Found on bottoms
On land known as pill bugs
9 marine species

Order Isopoda

34

Contains 2 segments (cephalothorax and abdomen)

Merostamata

35

Contains only 4 species
Horseshoe crab more closely related to spiders than crabs
The blood is blue because it has cooper
Has enzyme which release a natural antibiotic to fight bacteria
Blood used to detect bacteria in medical supplies and drugs

Merostamata

36

Sea spiders
Can't spin webs
Contains 4-6 pairs of legs
1300 known species

Pycnogonida

37

The process of fusion of the body regions in Anthropods

Tagmosis

38

Class for horseshoe crab

Merostamata

39

The most important order of crustaceans for human

Decapoda

40

Which cell layer secretes the exoskeleton of crustaceans

Epidermis

41

Which body region of lobster do humans eat

Abdomen

42

What do you call the first pair of appendages on a horseshoe crab

Chelicerae

43

Horseshoe crabs use this to turn themselves over and for defense

Telson

44

Head and thorax fused

Cephalothorax

45

To what body region are the legs of Decapoda attached

Thorax

46

Fused specialized body regions in Arthropoda

Tagmata

47

Which organisms feed with a large suctorial proboscis?

Sea spiders

48

Molting process

Ecdysis

49

Molting occurs most frequently during what life cycle?

Larval

50

Horseshoe crab respiratory organs are called

Book gills

51

The exoskeleton of crustaceans is composed of this material

Chitin

52

Chambers filled with fluid and lined with sensitive hairs that help with balance and equilibrium

Statocysts

53

Most female crustaceans brood their fertilized eggs on what body region?

Abdomen

54

The hard outer cuticle which covers and protects the body of a decapod

Carapace

55

What is the first larval form for most crustaceans called

Zoea

56

The ability of crustaceans to release an injured appendage

Autonomy

57

Structured with which barnacles feed

Cirri (legs)

58

Larval stage of barnacle

Nauplius

59

Excretory and osmotegulatory organs located on the head of the crayfish

Green glands

60

Subclass of Copepods

Copepoda

61

Subclass for barnacles

Cirripedia

62

Which pair of mouth parts are jawed feet that situate and hold the food in front of the mouth

Maxillipeds

63

This part of the crayfishes stomach has calcareous teeth which grind food particles

Gastric mill

64

The most common type of reproductive strategy used by crustaceans

Sexual external fertilization

65

This pair of mouth parts actually crush and grind the food so are involved in the actual ingestion

Mandibles

66

The two types of barnacles are stalked and

Acorn

67

Chelipeds are

Claws

68

The abdominal appendages of lost crustaceans are used to carry eggs

True

69

Which of these is also called a decorator crab

Spider crab

70

The order in which the blue crab is found

Decapoda

71

The only pelagic Decapoda

Shrimp

72

When do shrimp typically migrate to the surface to feed

Evening and predawn

73

Crustaceans consume their cast off exoskeleton much of the time for needed protein and calcium carbonate

False

74

Barnacles are always sessile

False

75

Has an oversized claw used for combat or courtship display

Fiddler crab

76

All crabs are aquatic

False

77

The most powerful and agile swimmers of all marine crustaceans

Blue crabs

78

Inhabit abandoned Gastropoda shells

Hermit crabs

79

Spiny lobster are protected from April to the end of July

True

80

Used by farmers as livestock feed until it was discovered that it caused the meat to taste bad

Horseshoe crab