Cockroach NCERT Flashcards
Cockroaches are — or —- bodied animals that are included in class — of Phylum —.
brown or black
Insecta , Arthropoda
—, —- , —- coloured cockroaches have also been reported in —regions.
Bright yellow, red and green
tropical
Their (cockroaches) size ranges from —- (—-)
¼ inches to 3 inches
0.6-7.6 cm
Cockroaches have — antenna, legs and — extension of the — that conceals —.
long
flat extension, upper body WALL
head
Cockroaches are —, —- that live in — places —–.
nocturnal, omnivores
damp
throughout the world
Cockroaches have become residents of — and thus are serious — and —–
human homes
pests
vectors of several diseases.
The — of the common species of cockroach, —- are about —- long with wings that extend — of the — in —.
adults
Periplaneta americana
34-53 mm
beyond the tip, abdomen
MALES
The body of the cockroach is — and divisible into – distinct regions – — (Figure 7.14).
segmented, three
head, thorax and abdomen
The ENTIRE body is covered by a —- (— in colour).
hard chitinous exoskeleton
brown
In each segment, exoskeleton has — called — (tergites — and sternites —)
hardened plates
sclerites
dorsally, ventrally
Sclerites are joined to each other by a — and —- (—-membrane)
thin and flexible articular membrane
arthrodial
Pronotum is
Chitinous plate covering protothorax and partially head also
Head is — in shape and lies — at RIGHT angles to the —- .
triangular
anteriorly
longitudinal body axis
Head is formed by the fusion of — and shows great —- due to —
six segments
mobility in all directions
flexible neck
The —- bears a PAIR of compound eyes.
head capsule
A pair of —- antennae arise from — lying in front of —.
thread like (filliform in diagram)
membranous sockets
eyes
Antennae have —- that help in —-
sensory receptors
monitoring the environment
— end of the head bears — forming === type of mouth parts.
Anterior, appendages
biting and chewing
The mouthparts consisting of a labrum (—-), a pair of —, a pair of —and a labium (—-)
upper lip, mandibles
maxillae , lower lip
A —-, acting as tongue (—), lies within the — enclosed by
the —-
median flexible lobe
hypopharynx
cavity, mouthparts
Thorax consists of three parts – —, — and —-
prothorax, mesothorax and metathorax.
The head is connected with thorax by a — —known as the —-
short extension of the prothorax
neck
Each thoracic segment bears a pair of —-.
walking legs
The first pair of wings arises from — and the second pair from —
mesothorax
metathorax
—- (mesothoracic) called
— are —, — and —-and cover the hind wings when at
rest.
Forewings, tegmina
opaque dark and leathery
The hind wings are —, —- and are used in —.
transparent, membranous
flight
Regions in mandible
Grinding and Incision
What is Ocellus
Pair of vestigial simple eye present ifo compound eyes
Antenna is segmented. T/F
T
Dorsal mouth part is —- and ventral is —-
Labrum
Labium
The abdomen in both males and females consists of — segments.
10
In females, the —- is boat shaped and together with the—- forms a —- pouch
7th sternum
8th and 9th sterna
brood or genital
Genital/ brood pouch whose —- part contains—, —, —–.
anterior
female gonopore, spermathecal pores and collateral glands
In males, genital —- lies at the — of abdomen
pouch or chamber
hind end
Genital pouch/chamber in males is bounded dorsally by —- and ventrally by—–.
9th and 10th terga, the 9th sternum
Genital pouch/chamber contains —, — ,—–
DORSAL anus, VENTRAL male genital pore and gonapophysis.
Males bear a —– which are absent in females.
pair of short, threadlike anal styles
In both sexes, the — segment bears a pair of —- structures called anal —-.
10th. jointed filamentous
cerci
The alimentary canal present in the — is divided into three regions: —-, —-, —-
body cavity
foregut, midgut and hindgut
The mouth opens into a —–, leading to a —– called oesophagus.
short tubular pharynx
narrow tubular passage
Oesophagus in turn opens into a — structure called — used for —–
sac like, crop
storing of food
The crop is followed by — or —-.
gizzard or proventriculus
Proventriculus has an outer layer of —–
thick circular muscles
Proventriculus has — inner —- forming —— called —
thick, cuticle
six highly chitinous plate
teeth
Gizzard helps in — the food particles.
grinding
The entire —- is lined by
cuticle.
foregut
A ring of —- called —– is present at the junction of foregut and midgut, which secrete —–
6-8 blind tubules
hepatic or gastric caecae
digestive juice
At the junction of midgut and
hindgut is present another ring of —-, —-, —-,
100-150, yellow coloured
thin filamentous
Malpighian tubules
Malpigian tubule help in removal of —- products from —-.
excretory, haemolymph
The —-gut is broader than —-gut
hindgut, midgut
Hindgut is differentiated into
—, —-, —–.
ileum, colon and rectum
The —- opens out through anus.
rectum
Blood — system of cockroach is an —type
vascular
open
Blood vessels are —– and open into space (—–).
poorly developed
haemocoel
—- located in the haemocoel are bathed in blood (—-)
Visceral organs, haemolymph
The haemolymph is composed of —-, and ——
colourless plasma and haemocytes
Heart of cockroach consists of —– lying along —–
elongated muscular tube
mid dorsal line of thorax and abdomen.
Heart is differentiated into —- chambers with —- on either side.
funnel shaped, ostia
Blood from — enter heart through — and is pumped —- again
sinuses. ostia
anteriorly to sinuses
The respiratory system consists of a
—-, that open through —–
of —- called —
network of trachea
10 pairs, small holes
spiracles
Spiracles are present on the
—– of the body.
lateral side
Thin branching tubes (—–)
carry —- from the air to all the parts.
tracheal tubes subdivided into tracheoles
oxygen
The opening of the spiracles is regulated by the —-.
sphincters
Exchange of gases take place at the —- by —-
tracheoles
diffusion
Excretion is performed by —-.
Malpighian tubules
Each malphigian tubule is lined by — and —- cells.
glandular and ciliated
Malphigian tubules absorb —- and convert them into —- which is excreted out through the —.
Therefore, this insect is called —.
nitrogenous waste products
uric acid, hindgut
uricotelic
In addition to malphigian tubules, the —, — and —– also help in excretion.
fat body, nephrocytes and urecose glands
The nervous system of cockroach consists of a —– joined by —– on —— side.
series of fused, segmentally arranged ganglia joined by paired longitudinal connectives
on the ventral side
—- ganglia lie in the thorax, and — in the abdomen.
Three, six
The nervous system of cockroach is present —- body.
spread throughout the
The head holds a bit of a nervous system while the rest is situated along the —– part of its body
ventral (belly-side)
So, now you understand that if the
— of a cockroach is cut off, it will still live for as long as —-.
head, one week
In the head region, the brain is represented by —- ganglion
which supplies NERVES to —- and —-.
supra-oesophageal
antennae and compound eyes
In cockroach, the sense organs are —, ———, etc
antenna, maxillary and labial palps, cerci, compound eye
The compound eyes are situated at the —- surface of the head.
dorsal
Each eye consists of about —-
2000 hexagonal ommatidia
With the help of — ommatidia, a cockroach can receive —- of an object.
This kind of vision is known as —-vision
several.
several images
mosaic
Mosaic vision with more — but less resolution, being common during
— (hence called —-).
sensitivity, resolution= night
nocturnal vision
Cockroaches are — and both sexes have — reproductive organs
dioecious
well developed
Male reproductive system consists of a pair of testes one lying on EACH — side in the—-
segments.
lateral, 4th -6th abdominal
From each testis arises a —-
thin vas deferens
Vas deference which opens into — through —
ejaculatory duct
seminal vesicle
The ejaculatory duct opens into
—- situated VENTRAL to —.
male gonopore
anus
A characteristic — shaped gland is present in —– segments which functions as an —- gland.
mushroom
the 6th-7th abdominal
accessory reproductive
The external genitalia are represented by —- or —-
male gonapophysis or phallomere
Phallomeres are —- structures,
surrounding the —-
chitinous asymmetrical
male gonopore
The sperms are stored in the — and are — together in the form of — called—–
seminal vesicles, glued
bundles
spermatophores
—– are discharged during copulation
spermatophores
The female reproductive system consists of —- ovaries, lying — in the —– segments.
two LARGE, laterally
2nd – 6th abdominal
Each ovary is formed of a group of —- or —-
eight ovarian tubules or ovarioles
Ovarioles contain a chain of —-
developing ova.
Oviducts of each ovary unite into a — (also called —-)
single median oviduct
vagina
Vagina opens into which opens into the —-.
genital chamber
A PAIR of —- is present in the 6th segment which opens into the —- in females
spermatheca
genital chamber
Sperms are transferred through –.
spermatophores
Their FERTILISED eggs are encased in — called —-.
capsules, oothecae
Ootheca is a — to —- capsule, about —- long.
dark reddish to blackish brown
3/8” (8 mm)
Ootheca are — or —- to a suitable surface, usually in a crack or crevice of —–, —–
dropped, glued
high relative humidity near a food source.
On an average, females produce —- oothecae, each containing — eggs.
9-10
14-16
The development of P. americana
is —-, meaning there is development through —-.
paurometabolous
nymphal stage
The nymphs look very different from adults. T/F
False
The nymph grows by — about — times to reach the adult form.
moulting, 13
The — nymphal stage has — but ONLY adult cockroaches have wings.
next to last
wing pads
Many species of cockroaches are — and are of — importance.
wild, no economic
A few species thrive in and around —-
human habitat.
They are —- because they destroy food and — it with their —. They can transmit a variety of —- diseases by contaminating food material.
pests, contaminate
SMELLY excreta
BACTERIAL
Types of phallomere
Right, Left and Ventral
Left phallomere consists of
Titillator and Psuedopenis
Mushroom glands have —- tubules
Short and long
Genital pouch in females consist of
Genital chamber, Vestibulum
Midgut is also called
Mesenteron
1st chamber of heart is called
Anterior aorta
No of alary muscles and no of chambers in heart
12pairs of alary muscle
13 chambers in heart
Segments in cockroach bear —.
jointed appendages
A PAIR of— is present near crop. . A pair of testes is present in
salivary gland
Fertilisation is internal. T/F
T
Female produces 9-10 ootheca bearing —-. After rupturing of single
ootheca — young ones, called — come out.
developing embryos
SIXTEEN, nymphs
