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13. Maak ‘n tekening van die insek soos van die kant gesien.

Liggaamsbou

  • Die liggaam bestaan uit drie hoofdele: die kop, bors en agterlyf.
  • Die insek het ‘n eksoskelet wat uit ‘n sterk leeragtige stof bestaan wat ons chitien noem.
  • Die drie pare gelede pote is aan die bors vasgeheg.
  • Twee pare vlerke word ook op die bors gedra: die voorstes is leeragtig en lê plat teen die liggaam; die agterstes is sag en vou soos waaiers onder die voorstes in.
  • Die kop dra:

- twee antennes (voelhorings) waarmee die insek kan voel;

- drie klein oë wat ons enkelvoudige oë noem;

- twee groot of saamgestelde oë; en monddele.

  • Die agterlyf dra geen aanhangsels nie, behalwe klein geslagsorgane op die punt wat by die mannetjie en wyfie verskil.
  • Op elke segment van die agterlyf is daar ‘n asemhalingsopening.

Beweging

Insekte is baie beweeglik. Dink maar aan die ratsheid van ‘n vlieg en die afstande wat sprinkaanswerms kan vlieg.

Die pote is gelit. By die sprinkaan is die agterpote sterker ontwikkel sodat hy kan spring.

Die voorste vlerke vou dwars oop en balanseer die insek tydens vlug (soos die vlerke van ‘n vliegtuig), terwyl die sagte agterste vlerke soos waaiers oopvou en die eintlike vliegwerk doen.

Voeding

Die sprinkaan is ‘n plantvreter met monddele wat baie goed vir dié doel aangepas is. Daar is onder meer twee voelertjies waarmee hy die voedsel kan voel sodat hy dit in die mond kan instoot. Daar is ook twee kake met snyvlakke wat die plantmateriaal fynkerf. Die sprinkaan het dus bytende monddele.

Ander insekte het dieselfde monddele as die sprinkaan, maar die vorm kan baie verskil om by ander voedingswyses aan te pas. Hulle kan byvoorbeeld lekkend wees (die vlieg), suigend (sommige motte) of stekend (die muskiet).

Asemhaling

Op elk van die eerste agt agterlyfsegmente is daar aan weerskante ‘n asemhalingsopening. Hierdie openinge lei na ‘n netwerk van buisies (trageas) wat deur die hele liggaam vertak en lug vervoer.

Handhawing van waterbalans

Die eksoskelet van die sprinkaan vorm ‘n waterdigte huidbedekking. Dit beteken dat die liggaam nie vog verloor nie en dus in droë toestande kan oorleef. Die plantmateriaal wat die sprinkaan vreet, bevat voldoende water.

Voortplanting

Jy het in graad 6 geleer dat ‘n vlieg ‘n volledige gedaanteverwisseling of metamorfose ondergaan vandat die eier uitbroei totdat daar ‘n volwasse vlieg ontwikkel het. Kan jy die stadiums nog onthou? Vul hulle op die onderstaande illustrasie in.

Die sprinkaan ondergaan nie ‘n volledige metamorfose nie. Nadat die mannetjie en wyfie gepaar het, lê die wyfie eiertjies met haar lêboor in die grond. Klein sprinkaantjies broei uit wat lyk soos die volwassene. Soos wat hulle groter word, vervel hulle ‘n paar keer. Ons praat dus van ‘n onvolledige metamorfose.

Die sprinkaan en ander insekte in die ekosisteem

Opdrag 3:

Verduidelik hoekom die sprinkaan en ander insekte besonder goed by hulle omgewing aangepas is.

Afhanklikheid van water:

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Questions & Answers

anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
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Source:  OpenStax, Natuurwetenskappe graad 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11078/1.1
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