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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

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
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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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