Cell The unit of life

Presented By: Pranav Ahlawat

Cell :- The Unit Of Life

It is the basic structural, functional and biological unit of all known living organisms.

Cells are the smallest unit of life that can replicate independently, and are often called the “building blocks of life”.

Body Organization

Bricks

Walls

Rooms

Building

Organs

Organ System

Tissue

Cells

Body

Difference: Organ & Organ System

Human Body: Formed of different Organ Systems

Types of Organism:

Unicellular Organism: Made up of single cell. For eg: Amoeba, Paramoecium etc.

Multicellular Organism: Made up of many cells. For eg: Elephant, Plants etc.

Shape of Cells:Cells are of different shapes.Some Cells keep changing their shapes. Ex: Amoeba.Some Cells are spherical, round, elongated, spindle shaped or

branched.

Activity 1- Identify Us!!!

Amoeba Neuron Spirogyra Euglena

Yeast Bacteria Rhizopus Paramoecium

Parts of a cell

To be continued:Cell membrane: It is a thin layer that surrounds the cell. It selectively allows the movement of substances into and out of the cell. It also gives shape to the cells.Nucleus: A dense, rounded body that controls all the activities of the cell. It is called as brain of the cell.Cell Wall: It is the additional wall outside the cell membrane. It is present only in plant cells. It is important for plants since they do not have skeleton for support and protection.Cytoplasm: It is a jelly like substance inside the cell. It has nucleus and various other cellular components with in it. These components are called as cell organelles.

Activity 2: The Cell as School

Organelles Function Part of our school that has a similar function

Cell membrane

Nucleus

Cytoplasm

Cell Organelles:

Comparison: Plant & Animal Cell

Activity 3: Vs

Sr. No.

Part Plant cell Animal cell

1. Cell membrane

2. Cell wall

3. Nucleus

4. Cytoplasm

5. Plastids

6. Vacuoles

Activity 4: Naming!!!!

Thank you