Cockroaches

Question 1

Phylum,class and species name for cockroach

Answer 1

Phylum arthropoda, classinseca andperiplaneta americana

Question 2

Which atmosphere are they found at

Answer 2

they are found at warm and humid places

Question 3

Size of cockroach

Answer 3

1/4-3 inches

Question 3

adapted for fast running

Answer 3

cursorial

Question 4

size of adult cockroach

Answer 4

34-53 mm

Question 5

how does chitinous exoskelton help its body

Answer 5

It protects the body and prevents loss of water

Question 6

Exoskeleton structure

Answer 6

Each segment is called sclerites joined by an arthrodial membrane
Dorsal side- tergites
ventral sides: sternites
lateral side:pleurites

Question 7

shape and formation of head

Answer 7

triangular in shape and formed due to fusion of 6 segment . Head bears great mobility due to flexible neck

Question 8

Body is divided into

Answer 8

head, thorax and abdomen

Question 8

Write about the antannae of the head

Answer 8

They are located in antennal sockets in fron of the eye. They are sensory in function

Question 9

Write about the simple and compund eye

Answer 9

Internal to the base of the antannae is a degeneratd simple eye/ocellus. near the base of the antannae lies a compund eye which is kidney shaped

Question 10

mouth type

Answer 10

mandibulate type-biting and chewing

Question 11

mouth parts

Answer 11

labrum-upper lip
mandibles main mouth part that help in grinding the food
maxillae- present as a pair help to push food while swallowing
labium- lower lip
hypopharynx- tongue

Question 12

thorax is divided into

Answer 12

prothorax-mesothorax-metathorax

Question 13

Largest tergite

Answer 13

Protonema/tergite of prothorax

Question 14

Extensions arising from thorax divisions

Answer 14

each thorax division has a pair of jointed legs for locomotion
meta and meso thorax have wings

Question 15

write about the two types of wings

Answer 15

the mesothoracic pair of wings are brownish, Hard and chitinous nut these are not used for flying they are used for protection - wing covers-elytra

The metathoracic wings are transparent and thin made for flying

Question 16

how are wings derived

Answer 16

they are extenions of the exoskeleton which region do cockroaches show sexual dimorphismmen

Question 17

gland that produces foul smell

Answer 17

stink gland or repugnatorial gland

Question 18

formation of female genital pouch

Answer 18

7th sterna is boat shaped. 8 and 9 sternum is joined together to form a genital pore which contains female gonopore, spermathecal glands and colleterial glands

Question 19

formation of male genital pouch

Answer 19

In males, by the 9th and 10th tergum and by 9th sternum genital pore is formed it cponsis of dorsal anus, ventral male genital pore and gonphophysis

Question 20

Special structures prsent in ockroaches

Answer 20

anal cerci present in both females and males in the 9th tergum and only in male, anal style is resentint he 10th sternum

Question 21

Alimentary canal is dividd into

Answer 21

foregut, midgut and hindgut

Question 22

Foregut consists of

Answer 22

mouth , oesophagus , pharynx, crop and gizzard

Question 23

What is the foregut lined with

Answer 23

cuticle

Question 24

write about crop and gizzard

Answer 24

after the esophagus, the food enters a thin walled crop which is mainly used for storage . After the crop the food passes on to the thick walled , muscular gizzrd/proventriculus specialized in grinding food

Question 25

Teeth is made up of

Answer 25

chitin

Question 26

Junction of midgut and foregut

Answer 26

6-8 blind tubules called hepatic caecaae . It secretes digestive juices and is main site of digestion and absorption

Question 27

What is the specialization f hindgut

Answer 27

main site for water absorption . It also combines undigested matter and uric acid

Question 28

hindgut is diivided into

Answer 28

Anterior narrow and short ileum, middle long and wide colon and terminal short and sac like rectum

Question 29

Junction of midgut and hindgut

Answer 29

100-150 small thred like structures called malphigian tubuleshich are excretory in function . It removes excretory products from haemolymph

Question 30

How is excretory material excrete

Answer 30

in the form of slender pellesfunc

Question 31

tion of the following parts Mouth Pharnx and oesophagus crop gizzard hepatic caecae mesenteron hindgut rectum anus

Answer 31

1. reception of food 2. conduction of food 3. stoarage of food 4. grinding the fod 5. production of digestive enzymes 6. Digestion and absorption of food 7. Absorption of water 8. Storage of undigestion food 9. egestion

Question 32

respirtion system

Answer 32

trachea that opens through ten pairs of spirale in which 2 lie in the thorax and eight in thr abdomen

Question 33

Location of spiracles

Answer 33

in the thorac , located between the junctions of pro and meso and meso and met. In the abdomen on each in the first eight segmens

Question 34

how does the trachea end

Answer 34

Then end is a large terminal cells called tracheole from which arise very fine tracheoles the tracheloes endin tissue cells .

Question 35

What does the tracheal system do and why cant blood help

Answer 35

transports oxygen through the body through diffusion as blood is unable to do so bcuz of lack of respiratory pigment

Question 36

type of circulatory system

Answer 36

open type

Question 37

Blood of cockroach is

Answer 37

colorless and has no hemoglobin pigments. Contains plasma and hemocytes

Question 38

location of heart

Answer 38

between the mid dorsal line of midgut and hindgut

Question 39

chambers of hert

Answer 39

13 funnel shaped chambers

Question 40

flowing of blood in heart

Answer 40

the sides of the heart have minute opening callled ostia which help in one directional flo from posterior end to anterior end

Question 41

how does haemolymph circulate in the body

Answer 41

contraction and relaxation of heart regulated by alaey muscles

Question 42

excretory organ of cockroach

Answer 42

malphigian tubules

Question 43

Location and structure of m.t

Answer 43

extreme anterior end of hindgut. Lies freel in haemolymph covered by glandular or ciliated spithelium

Question 44

unctions of m.t

Answer 44

absorb itrogenous wastes and convert them to uric acidh

Question 45

ow does the uric acid become solid

Answer 45

The uric acid moves to ileum , more absorbtion of water happens in colon and rectum giving it a solid state

Question 46

Cockroach is ..........(Excretory)

Answer 46

urecotelic

Question 47

function of fat body

Answer 47

help in starving fats that can be used in staration

Question 48

function of uricose glands

Answer 48

help in uric acid formation and storage