Cell - Structure And Functions

The vacuoles size varies in plant and animal. Plant cell have single large sized vacuole, whereas, animal cell have numerous small sized vacuoles.

Organisms made up of single cell are called unicellular organism. Organisms made up more than one cell are called multicellular organism.

Match the following:

Pseudopodia help Amoeba in movement and in capturing the food.

Cell membrane provides cell its shape.Cell membrane is important for movement of substance both inward and outward of cell.

Cell wall provides rigidity to plant cell.

Tissue is a group of similar cell performing a specific function.

Prokaryotes do not have well organised nucleus and Eukaryotes have well organised nucleus with nuclear membrane.

Tissue is composed of cell and Organ is made up of tissue.

Unicellular organisms: Amoeba and Paramecium.

Multicellular organism: Human and Mouse.

Functions of Plasma membrane:

1. Shape to the cells of plants and animals.
2. Separates cells from one another and also the cell from the surrounding medium.
3. Allows the movement of substances or materials both inward and outward.

Functions of Cell wall:

1. Gives rigidity to plant cell.
2. Protection against variations in temperature, high wind speed, atmospheric moisture, etc.

Function of Nuclear membrane:

1. Separates nucleus from cytoplasm.
2. Allows the movement of materials between the cytoplasm and the inside of the nucleus

The entire content of a living cell is known as protoplasm.It includes the cytoplasm and the nucleus.

Plastids are coloured bodies found in the cytoplasm of plant. They are of different colour.

Chloroplast is green coloured plastid. It provides green colour to leaf.

Chloroplast is essential for photosynthesis and it provide green colour to leaf of plant.

Chromosomes are thread like structure within nucleus.

Nerve Cell nerve cell receives and transfers messages, thereby helping to control and coordinate the working of different parts of the body.

Prokaryotes: Bacteria and Blue-green algae

Eukaryotes: Human and Plant

Cells in Onion peel.

Human cheek cell.

Gene is a unit of inheritance in living organisms.
Function: Controls the transfer of character from parents to offspring. p>

1. Cell membrane
2. Cytoplasm.
3. Nucleus.
4. Chloroplast
5. Vacuole
6. Cell wall.

Animal cell: