Introduction to Living Things

Wetmount

A way to prepare a slide for looking at cells under a microscope by placing a drop of liquid on it, covering it with a thin glass piece to keep the sample in place.

Multicellular

An organism made up of many cells working together, like humans, animals, and plants.

Unicellular

An organism made up of only one cell, like bacteria, which can do all its life processes on its own.

Organelles

Tiny structures within a cell that each have special jobs, like making energy or storing food, similar to organs in our bodies.

Cell Membrane

The thin, flexible layer around the cell that controls what goes in and out, like a security gate.

Cytoplasm

The jelly-like fluid inside the cell that holds organelles in place and lets them move around.

Nucleus

The control centre of the cell, where instructions (DNA) are stored, guiding the cell's activities.

Vacuoles

Storage spaces inside the cell that can hold water, nutrients, or waste, like a storage bin.

- 1 Large Vaculoe in plant cells.
- Many small vaculoes in animal cells

Cell Wall

A strong, rigid layer found outside the cell membrane in plant cells, giving them structure and support, much like a skeleton for the cell.

Cellulose

A tough, fiber-like material that makes up the cell wall in plant cells, helping to keep plants strong and upright.

Chloroplasts

The green structures in plant cells that use sunlight to make food through photosynthesis, like solar panels for plants.

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