Page 77 - Science Course 1 (Book 1)

Cell Types and Their Structures Mo3-L3a: What are the Structures of a Cell?
Lesson 3

Cytoplasm

the liquid part of a cell inside the cell membrane;
In this topic, you will learn the following contains salts and other molecules.
lessons:

Mo.3 - L3a: What are the Structures of a Cell?
Mo.3 - L3b: The Types of Cells and the Functions
of Their Structures

Mo3-L3a What are the Structures of a Cell?

KEY CONCEPTS:
1. Why are the structures of a cell important? Cytoplasm

Cytoskeleton
Vocabulary A-Z a network of threadlike

Let us learn some vocabulary proteins joined together
that gives a cell its
shape and helps it
Cell Membrane move.

a flexible covering that protects the inside of
a cell from the environment outside the cell.

Let’s Begin

Cell Shape and Movement

The size and shape of a cell relates to its job or
function.

Cells are made of different structures
that perform different functions that keep a cell alive.

The cell membrane is a flexible covering that
protects the inside of a cell from the environment
Cell Wall outside a cell.

a stiff structure outside A cell wall is a stiff structure
the cell membrane that outside the cell membrane
protects a cell from attach that protects a cell from
by viruses and other attack by viruses and other
harmful organisms. harmful organisms.
Cell wall and Membrane
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