7. Prokaryotic Cell Structures & Functions
Bacterial Cell Morphology & Arrangements
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In this video we're going to focus on spiral shaped bacterial cells. And so spiral shaped cells can actually have a few varied morphologies or shapes that are never completely straight. And so down below in this image, we're showing you 3 different morphologies of spiral shaped cells. The first one on the far left is Vibrio, which is really a bent shaped short curved rod. And so you can see that it has this bent shape here. It's not completely, straight. And so it's barely a spiral, but it is going to create this curve here that is the beginning of a spiral. And so Vibrio cholerae is an example of a bacteria that takes on this vibrio shape. And so you can see that these bacteria are curved as you can see here in this image. Now the next one that we have here is speryllum, which we already talked about in some of our previous lesson videos. These are curved rods that actually form a full spiral. And you can see that this right here resembles a cork screw, and it is forming a spiral shape. And so once again, spirillum minus is an example of a bacteria that has that corkscrew or spiral, spirulum shape. Now the third one that we have over here is very similar to the spirulum, But the difference is, the spirochete, which is this last one here, is going to be much longer than the the spirulina. And not only is it much longer, but it's also going to have more flexible cells. And, the spiral will not be as tight since it's, more elongated. And so you could see here it does have this curved spiral shape, but it is much more elongated, and it is going to be much more flexible. And so Borrelia burgdorferi is an example of a bacteria that takes on the spirochete morphology. And so this here concludes our brief lesson on spiral shaped bacterial cells. And once again, we'll be able to get some practice as we move forward. So I'll see you all in our next video.
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