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Natuurwetenskappe

Graad 4

Lewe en lewenswyse

Module 17

Die spysverteringstelsel

Aktiwiteit:

Om kennis te maak met die mens se spysverteringstelsel en enkele belangrike daarin te benoem

[lu 2.1]

Kom ons kyk hoe werk die spysverteringstelsel. Jou liggaam het voedsel nodig om te groei en gesond te bly. Daar is ‘n lang buis wat van jou mond af dwarsdeur jou liggaam loop tot by die opening waar die kos die liggaam verlaat. Die boonste deel van die buis is taamlik reguit, maar die onderste deel is redelik gekronkel. Daar gebeur verskeie dinge met jou kos terwyl dit deur hierdie buis gaan.

Wanneer jy die kos kou, maal jou tande dit fyn en met behulp van die speeksel kan jy dit afsluk.

Nou word die kos deur die slukderm na die maag gestoot. Daar is spiere in die wande van die slukderm wat outomaties saamtrek om die kos aan te stoot. Ons noem hierdie beweging peristalse .

Die kos word in die maag deur die spiere in die maagwand gemeng, fyngemaal en geroer.

In die dunderm word die voedingstowwe uit die kos gehaal en met die bloed na die lewer en ander liggaamsdele vervoer.

Die orige kos beweeg nou deur die dikderm en alle voedsel wat jou liggaam nie nodig het nie, word deur die liggaam uitgeskei.

Opdrag:

Voltooi die skets deur byskrifte in te vul

Skryf ‘n goeie sin om te verduidelik waarom babas net van melk kan leef.

Assessering

LU 2

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

 

Dit is duidelik wanneer die leerder:

2.1   betekenisvolle inligting onthou;

2.2       inligting kategoriseer.

 

Memorandum

DIE SPYSVERTERINGSTELSEL

  1. Mond
  2. Slukderm
  3. Maag
  4. Dunderm
  5. Dikderm

Questions & Answers

what is phylogeny
Odigie Reply
evolutionary history and relationship of an organism or group of organisms
AI-Robot
ok
Deng
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Hajah Reply
the study of living organisms and their interactions with one another and their environments
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HOW CAN MAN ORGAN FUNCTION
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the diagram of the digestive system
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Ogenrwot
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They formed in two ways first when one sperm and one egg are splited by mitosis or two sperm and two eggs join together
Oluwatobi
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Josephine Reply
Genetics is the study of heredity
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Misack
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Hassan Reply
discuss biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles
Joseph Reply
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Yousuf Reply
the study of living organisms and their interactions with one another and their environment.
Wine
discuss the biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles in an essay form
Joseph Reply
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Shaker Reply
list any five characteristics of the blood cells
Shaker
lack electricity and its more savely than electronic microscope because its naturally by using of light
Abdullahi Reply
advantage of electronic microscope is easily and clearly while disadvantage is dangerous because its electronic. advantage of light microscope is savely and naturally by sun while disadvantage is not easily,means its not sharp and not clear
Abdullahi
cell theory state that every organisms composed of one or more cell,cell is the basic unit of life
Abdullahi
is like gone fail us
DENG
cells is the basic structure and functions of all living things
Ramadan
What is classification
ISCONT Reply
is organisms that are similar into groups called tara
Yamosa
in what situation (s) would be the use of a scanning electron microscope be ideal and why?
Kenna Reply
A scanning electron microscope (SEM) is ideal for situations requiring high-resolution imaging of surfaces. It is commonly used in materials science, biology, and geology to examine the topography and composition of samples at a nanoscale level. SEM is particularly useful for studying fine details,
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Source:  OpenStax, Natuurwetenskappe graad 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11097/1.1
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