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Natuurwetenskappe

Graad 9

Lewensprosesse: ‘n gesonde lewe

Module 6

Ekskresie- en uitskeidingsisteem

Van die mens

Al die afval wat jou selle deur metabolisme produseer, moet uit jou liggaam verwyder word.

Die sisteem wat hiermee gemoeid is, is die EKSKRETORIESE SISTEEM . Die hoofstelsel by die mens is die URIN Ê RE SISTEEM wat bestaan uit:

  • twee niere
  • twee ureters
  • blaas
  • enkele uretra

Urinêre sisteem

  • EKSKRESIE is die proses waardeur van afval onslae geraak moet word.
  • SEKRESIE , daarenteen, is die afgee of afskei van nuttige stowwe soos hormone, mukus, ens.
  • EKSKRETORIESE PRODUKTE is die verskillende stowwe waarvan ontslae geraak moet word.
ORGAAN EKSKRETORIESE PRODUK
Longe
Vel
Spv.kanaal
Niere

Niere werk soos filtreerders en moet ongeveer 15 000 liter bloed per dag filtreer. Slegs 'n filtraat bekend as urine verlaat die liggaam – ongeveer 1,5 liter per dag.

Urine bevat 96% water, 2% ureum en 1 % soute, asook 1 % ander metaboliese stowwe.

Niere funksioneer op hulle beste as 'n mens 6 - 8 glase water per dag drink. Vermy te veel koffie, gekleurde koeldranke en te veel sout. Dit alles laat die niere harder werk.

'n Persoon kan goed funksioneer met net een nier. Persone met erge nierkwale moet 'n nier-dialise ondergaan – dit word gedoen met 'n masjien wat die bloed suiwer. Gewoonlik is sulke pasiënte kandidate vir nieroorplantings en wag hulle op skenkers.

SKETS VAN NIER:

  • Maak 'n eenvoudige skets van die nier om sy bou te toon – bestudeer 'n varknier en dissekteer dit.
  • VRAE OOR DIE NIER:

1. Hoe word die niere in die liggaam beskerm?

2. Wat is nierstene en hoe word dit deesdae behandel?

3. Wat is die funksie van die blaas?

4. Wat is die funksie van die sfinkter by die blaas?

5. Wat is inkontinensie? Bespreek die sensitiwiteit hierondom in die klas.

6. Wat sal die volgende in urine toon?

a) Glukose

b) Proteïne

Assessering: NIER-skets en vrae

Kon jy die skets teken en die vrae beantwoord?

[LU 2.1]

Assessering

LU 2

Konstruksie van Wetenskapkennis

Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewingskennis toe.

Dit is bewys as die leerder:

2.1 betekenisvolle inligting kan onthou;

2.2 inligting kan kategoriseer;

2.3 inligting kan interpreteer;

2.4 kennis kan toepas.

Memorandum

Ekskresie- en uitskeidingsisteem van die mens

ORGAAN EKSKRETORIESE PRODUK
Longe CO 2 en waterdamp
Vel Water en soute
Svk Voedselreste
Niere Water, soute en ureum

VRAE OOR NIER:

1. vetlaag

2. uriensuur vorm kristalle – oplosmiddels en laser

3. stoor urine

4. hou vloeistof binne en beheer vrystelling

5. onvermoë om sfinkter te beheer

6. a) suikersiekte b) nierinfeksie of skade of swangerskap

Questions & Answers

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
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
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
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Good
Berger describes sociologists as concerned with
Mueller Reply
My ma het umfeseem en ha voete swel baie en sy kani uriene afslaan ni wat kan dit veroorsaak
Miggie Reply

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Source:  OpenStax, Natuurwetenskappe graad 9. OpenStax CNX. Sep 15, 2009 Download for free at http://cnx.org/content/col11068/1.1
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