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BAB 2
SEL SEBAGAI UNIT ASAS KEHIDUPAN
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Intro
Cell is the basicunit of all livingthings.
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Microscope
Historians credit the invention of thecompound microscope to the Dutchspectacle maker, Zacharias Janssen,around the year 1590.
Eyepiece Lens: the lens at the top thatyou look through. They are usually 10X or
15X power. Arm: Supports the tube and connects it to
the base
Base: The bottom of the microscope,used for support
Stage: The flat platform where you placeyour slides. Objective Lenses: Usuallyyou will find 3 or 4 objective lenses on amicroscope. They almost always consistof 4X, 10X, 40X and 100X powers.
How to Focus Your Microscope?
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Gambar sel di bawah mikroskop
Sel bawang
Sel pipi
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Sel haiwan
Struktur sel Fungsi
Membran sel Mengawal pergerakan bahan
ke dalam dan ke luar sel.
Sitoplasma Tempat tindak balas kimia
berlaku.Nukleus Mengawal semua aktiviti sel
dan membawa maklumat
perwarisan.
Membran sel
Sitoplasma
Nukleus
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Sel tumbuhan
Struktur Sel Fungsi
Membran sel Mengawal pergerakan bahan ke dalam dan ke
luar sel.
Sitoplasma Tempat tindak balas kimia berlaku.
Nukleus Mengawal semua aktiviti sel dan membawa
maklumat perwarisan.
Dinding sel Memberi sokongan, perlindungan dan bentuktetap kepada sel.
Vakuol Berisi sap sel yang mengandungi gula dan
garam, serta memberi sokongan kepada sel
apa bila di penuhi air.
Kloroplas Mengandung klorofil yang menyerap cahaya
matahari semasa proses fotosintesis
Dinding sel
Membran sel
Vakuol
Kloroplas
Nukleus
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Persamaan & Perbezaan
Sel tumbuhan Persamaan Sel Haiwan
Kedua-dua sel :
Membran sel
Sitoplasma
Nukleus
Sel tumbuhan Perbezaan Sel haiwan
Ada dinding sel Dinding sel Tiada
Tetap Bentuk Tidak tetap
Biasanya mempunyai
vakuol yang besar
Vakuol Biasanya tidak
mempunyai vakuol
Ada kloroplas Kloroplas Tiada
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Exercise 2.1
Science Text Book (English)
Pg 43 & 44
Question 1-3(answer all)
Draw the pictures (Cell X and Y)
Draw the word maze
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Specialised Cells
Different types of cells look different because they are adapted to their function. They are said to bespecialised.
Similar cells that carry out the same function are grouped together in tissues.
Different tissues work together in organs.
Different organs are combined together to form organ systems.
For example, muscle cells form muscle tissue. The heart contains muscle tissue, nervous tissue and
connective tissue. The heart is part of the circulatory system.
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The Levels of Cell
Organization
Single Cell- smalleststructural unit of an
organism that iscapable ofindependent function.
Example - WhiteBlood Cell
Cell
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A group of cellsthat all do thesame work
Example -Muscle
Tissue
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Organ
A group of tissuethat works togetherfor perform afunction
Examples - Heart,Kidney, Lung
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System
A group of organs thatdo a certian job.
Examples - Circulatory
System, DigestionSystem, LymphaticSystem (immuneSystem)
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Microorganisms
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Structural Diagram of the Influenza
Virus
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Human body
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