<< Chapter < Page Chapter >> Page >

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

Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
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
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
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
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
hi
Loga
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
Berger describes sociologists as concerned with
Mueller Reply
what is hormones?
Wellington
My ma het umfeseem en ha voete swel baie en sy kani uriene afslaan ni wat kan dit veroorsaak
Miggie Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Natuurwetenskappe graad 9. OpenStax CNX. Sep 15, 2009 Download for free at http://cnx.org/content/col11068/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Natuurwetenskappe graad 9' conversation and receive update notifications?

Ask