Cells and microscopy - Intro

Scoop up one drop of water from a garden pond. It looks clear and empty. Under a microscope, it can be crowded with living things. Each of those living things is a single cell, far too small to see, swimming and feeding on its own. Every living thing in this course is made of cells, or is one. So every later chapter leans on this short one, and here is where to start.

Here is the chapter. Each video stands on the one before it, so the list runs in the order to watch. You can still step in wherever you already are.

If cells are new to you, start with Eukaryotic and prokaryotic cells. It covers the two kinds of cell, both found in pond water like that drop, and the one feature that tells them apart. The common slip there is giving a bacterial cell a nucleus. If you can already draw a cell, go to Sub-cellular structures and what each one does, which gives each part its job. A slip seen there is saying that mitochondria make energy. If numbers are what worry you, go to The size and scale of cells. That is where millimetres, micrometres and nanometres stop being a guess. A slip seen there is answering a standard form question with an ordinary decimal. With the exam close, finish on Microscopy and the magnification equation. It pulls the size work into one equation, with what each kind of microscope can show. A slip seen there is saying an electron microscope simply lets you zoom in. You can search for any video by its name or its code. The quickest way is the scholafly.com website, which indexes every video in every subject. Starting from scratch, press Eukaryotic and prokaryotic cells first.

Next in the chapter is Eukaryotic and prokaryotic cells. Hopefully that's next in your feed, but if not, search for ScholaFly B I oh one, oh one.

Every other video is on scholafly.com too, easy to search by video code or by keyword. Whatever you're revising, go there and have a look, or, watch the next video.