Arthropods - Myriapods

Question 1

What are myriapods?

Answer 1

All terrestial including millipiedes and centipedes with waxy waterproof epicuticle and tracheal gas exchange with dioecious indirect sperm transfer and spermatophore/direct transfer

Question 2

What are the distinct structures of Myriapods?

Answer 2

Head
Thorax
Abodemn

Question 3

What is the structure of the Myriapod head?

Answer 3

This has fused segments called a cephalic plate iteself bearing antennae and ocelli, as well as mouthparts with mandibles and maxillae

Question 4

What are the two distinct tagmata of myriapod heads?

Answer 4

Preantennal, with madnibles, maxillae and labium and antennal, with the antenna

Question 5

What is the structure of the thorax?

Answer 5

Segmented portion each with jointed legs, number of segments/legs being variable depending on species

Question 6

Tergite

Answer 6

This is the dorsal plate of the covering of a metameric segment of an arthrpod

Question 7

Sternite

Answer 7

This is a sclerotized plate forming the sternum of a segment

Question 8

What are the thorax sternite and tergite joined by?

Answer 8

Lateral pleura

Question 9

Why are the tergite and sternite important?

Answer 9

Attachment points for muscles for leg movement

Question 10

Why is the pleura important?

Answer 10

Movement between segments and flexibility.

Question 11

What is the abdomen composed of?

Answer 11

Tergites and sternite plates protecting the internal organs connected by a pleura

Question 12

What structures does the abdomen contain?

Answer 12

Spiracles for gas exchange and a tracheal system

Question 13

What do the thorax and abdomen form?

Answer 13

One continous trnk

Question 14

How many myriapoda species are there?

Answer 14

16,000 including classes chilopoda and diplopoda

Question 15

What are the 5 head segments?

Answer 15

First antennary segment(antennae deutrocrebrum)
Premandibular segment(tritocerebrum)
Mandibular
First maxillary
Second maxillary

Question 16

What does myriapoda locomotion depend on?

Answer 16

Sclerotized exoskeleton for support

Question 17

How are mtriapod legs associated with function?

Answer 17

Length allowing closeness to the ground however long enough for stride for speed

Question 18

How do centipedes move?

Answer 18

Rapid, alternating fashion allowing agiility and speed.

Question 19

How do milipedes move?

Answer 19

Wave-llike pattern with each leg pair moving in opposite direction for co-ordinated movement

Question 20

What facilitates movement?

Answer 20

Muscular contraction and nervous system innervation, with exoskeleton support/protection

Question 21

What is the primary feeding behaviour?

Answer 21

Predators of smaller invertebrates, can be herbivorous, carniboroous or omnivoorous

Question 22

How do Chilopods feed?

Answer 22

These have modified maxillipeds with sharp claws and venom glands used for prey immobilization and capture

Question 23

How do Diplopods feed?

Answer 23

Have a pair of mandibles and maxillae used for plant material and ofod movement

Question 24

What is the process of digestion in myriapods?

Answer 24

Fore, mid and hindgut with anus: nutrient absorption into hemocoel in the forgut

Question 25

Hemocoel

Answer 25

This is the body cavity of the insect that contains blood and all internal organs

Question 26

What is the reproductive straegy?

Answer 26

Exclusively dioecious using internal fertilization

Question 27

Metamorphosis

Answer 27

This is the process of transformation of an immature form to an adult form in two or more distinct stages.