Life's Building Blocks

Every living thing, from the smallest bacteria to the tallest tree, is made of cells. Cells are often called the "building blocks of life" because they carry out all the basic activities needed for survival.

Types of Cells

• Prokaryotic Cells: Simple cells without a nucleus (like bacteria).
• Eukaryotic Cells: More complex cells with a nucleus (like plants and animals).

Cell Structures

• Cell Membrane: The cell's outer layer, controlling what enters and leaves.
• Nucleus: The "control center" containing DNA.
• Cytoplasm: Jelly-like fluid inside the cell.
• Mitochondria: The cell's "powerhouse," making energy.

How Cells Work Together

In multicellular organisms, like humans, cells group together to form tissues, organs, and systems—each with its own job!

Why Cells Matter

Understanding cells helps us fight diseases, grow food, and even develop new medicines.