Nematology- Microbiology Pt.6

Hello everyone!

Awesome news- today, we’ve completed the whole of microbiology. Thank you for sticking with me :D, especially after the delay last week. I’ve got an amazing physics post coming up, so… YAY!

Let’s do this!

What are nematodes?

I think you’ve already guessed what they are by the above picture. But if you haven’t, then they’re worms… To be more specific, nematodes are actually roundworms. They’re a thriving population- with 15,000+ discovered species. Yikes- 15,000+ species of just one type worm. Sorry, but they aren’t my favorite creature…πŸ˜… Which creatures give you shudders? Drop a comment below!

Characteristics of Nematodes->

You know, not all worms are round. What sets nematodes apart is that they’re all round. If you took a cross-section of a nematode, then the resulting image would be circular. Not to mention, nematodes also have two separate genders, and they reproduce sexually. Can’t imagine worms doing the do. Actually, I don’t even want to…😬 Nematodes can also be microscopic- but they can grow to be nearly a meter long!

Types of Nematodes->

Well, despite there being 15,000+ nematodes species, they’re broadly divided into only two classes. The first class is Adenophorea- we’ll refer to it as Aphor for our purposes. And the second class is Secernentea- which we’ll refer to as Stea.

Aphor [Adenophorea] ->

Now, the basis upon which nematodes are divided into these two classes is whether they have phasmids or not. A phasmid is a sensory receptor, and in Aphor worms, they’re generally never present. Also, please do no confuse the sensory receptor phasmid with the insect phasmid- that just brings things to a whole new level of weird… Aphor worms are normally present in marine, freshwater and terrestrial habitats.

Stea [Secernentea] ->

These worms nearly always possess phasmids. That’s what sets them apartt from Aphor worms. Also, Stea worms live in different places compared to Aphor worms- they only live in terrestrial areas, and are rarely found in aquatic environments. On the other hand, Aphor worms are found in terrestrial, marine and freshwater habitats.

The Model Organism- C. elegans ->

One type of nematode- the C. elegans– has been particularly helpful in the lab. They are one of the easiest animals to handle, so they aren’t too much of a hassle. It’s incredibly small- only a millimeter long, and it’s transparent, so they’re convenient to use for research purposes. The C. elegans hermaphrodite[a hermaphrodite is a creature that has both male and female reproductive organs] has precisely 302 neurons- which is why it has been used to do research on neural development in animals.

That’s it for today, guys!

Thanks for reading, and bye!

Published by girrrrrl_of_two_worlds

hi! just a nerdy girl here. lover of science, english and learning on the whole. spreading knowledge is one of my favorite things to do! nothing in life is to be feared, it is only to be understood. now is the time to understand more, so that we may fear less. ~marie curie

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  1. So many different types of nematodes! I’m not particularly grossed out by worms, so this was fascinating πŸ™‚ they’re actually quite pretty when they’re backlit in these pictures!

    Liked by 1 person

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