7/28/2019 Bab 2 Ting 1 sains

1/18

BAB 2

SEL SEBAGAI UNIT ASAS KEHIDUPAN

7/28/2019 Bab 2 Ting 1 sains

2/18

Intro

Cell is the basicunit of all livingthings.

7/28/2019 Bab 2 Ting 1 sains

3/18

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?

7/28/2019 Bab 2 Ting 1 sains

4/18

Gambar sel di bawah mikroskop

Sel bawang

Sel pipi

7/28/2019 Bab 2 Ting 1 sains

5/18

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

7/28/2019 Bab 2 Ting 1 sains

6/18

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

7/28/2019 Bab 2 Ting 1 sains

7/18

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

7/28/2019 Bab 2 Ting 1 sains

8/18

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

7/28/2019 Bab 2 Ting 1 sains

9/18

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.

7/28/2019 Bab 2 Ting 1 sains

10/18

The Levels of Cell

Organization

Single Cell- smalleststructural unit of an

organism that iscapable ofindependent function.

Example - WhiteBlood Cell

Cell

7/28/2019 Bab 2 Ting 1 sains

11/18

A group of cellsthat all do thesame work

Example -Muscle

Tissue

7/28/2019 Bab 2 Ting 1 sains

12/18

Organ

A group of tissuethat works togetherfor perform afunction

Examples - Heart,Kidney, Lung

7/28/2019 Bab 2 Ting 1 sains

13/18

System

A group of organs thatdo a certian job.

Examples - Circulatory

System, DigestionSystem, LymphaticSystem (immuneSystem)

7/28/2019 Bab 2 Ting 1 sains

14/18

Microorganisms

7/28/2019 Bab 2 Ting 1 sains

15/18

Structural Diagram of the Influenza

Virus

7/28/2019 Bab 2 Ting 1 sains

16/18

7/28/2019 Bab 2 Ting 1 sains

17/18

Human body

7/28/2019 Bab 2 Ting 1 sains

18/18