Animal and plant cells

 

What are cells?

 

Cells are the building blocks of life on Earth. They are microscopic and can be either unicellular (one-celled) or multicellular (many-celled). Multicellular organisms have specialised cells that perform different functions.

 

What makes up an animal Cell?

 

Animal cells have four main parts:

 

• Nucleus: it contains DNA and controls the cell’s activities.
• Cytoplasm: it is mostly water and where chemical reactions happen.
• Cell membrane: it is a flexible layer that regulates what enters and exits the cell.
• Mitochondria: they are tiny parts in the cytoplasm that release energy from food. They are where most respiration happens.

 

 

 

 

 

What makes up a plant cell?

Plant cells have a regular shape and the same cell components as animal cells. They also have three extra parts:

 

• Cell wall: a tough layer with cellulose that gives strength and support to the plant.
• Vacuole: a space with cell sap that keeps the cell firm.
• Chloroplasts: structures in green parts of plants with chlorophyll for photosynthesis.

 

 

🔬 Knowledge Check: Animal & Plant Cells

Think you know your organelles? Test your cell biology skills below!

1. Which part of the cell controls all the cell's activities?

• Cytoplasm
• Nucleus
• Mitochondria

2. Which of these is found ONLY in a plant cell?

• Cell Membrane
• Ribosomes
• Chloroplasts

3. What is the jelly-like substance where most chemical reactions happen?

• Cytoplasm
• Vacuole
• Cell Wall

4. What is the main job of the mitochondria?

• To store water and sap
• To release energy through respiration
• To make food using sunlight

5. The cell wall is made of which tough material?

• Protein
• Cellulose
• Lipids

Check Your Answers

1. Nucleus (It contains the DNA and acts as the brain of the cell).
2. Chloroplasts (Animal cells don't photosynthesise, so they don't need them).
3. Cytoplasm (This surrounds the organelles and is where reactions occur).
4. To release energy (They are the energy generators of the cell).
5. Cellulose (This provides the rigid structure that supports the plant).

 

Summary:

Cells are the basic units of life and all living things are made of cells. Cells have different parts that do different jobs. Animal and plant cells are not exactly the same, but they have some parts in common. Four parts that both animal and plant cells have are:

 

• Nucleus: This is the control centre of the cell. It has the genetic information that tells the cell what to do.
• Cell membrane: This is the thin layer that surrounds the cell. It lets some things in and out of the cell, such as nutrients and waste.
• Cytoplasm: This is the jelly-like substance that fills the cell. It has many chemicals and structures that help the cell function.
• Mitochondria: These are the powerhouses of the cell. They break down food and release energy for the cell.