Phylum Platyhelminthes Part 1: General Characteristics

The first phylum within Spiralia that we will investigate is Platyhelminthes. These are the so-called flatworms. What are their characteristics? What are the clades within this phylum? Let's set ourselves up for a thorough investigation!
Script by Ryan Helcoski
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[@radlerdramatizations]

its unreal how much I enjoy that jingle at the beginning, everytime I watch one of these videos I get it stuck in my head the rest of the day!!

[@glennpearson9348]

Fun and educational, as always, Professor Dave! I giggled a bit at the notion of a "free living flat worm" when first mentioned. It brought to mind the notion that some flat worms might be falsely imprisoned for some reason.

[@Pablo-lh9wp]

Nose si haya mucha gente de habla hispana, pero espero q todo aquel q este cursando por zoologia le ayude estos maravillosos videos, 10/10!!!

[@Ratciclefan]

I've always loved these little guys' eyes. Looks like something straight out of a cartoon.

[@mitsunori222000]

Another excellent presentation. Please keep these coming (and go slow on the complex chemical reactions). Have followed and recommended your channel since the start and appreciate the improvements and the diversity. Thank you for restoring some faith in what CZcams can be.

[@peccantis]

I love learning about these little duderinos and their amazing organs. Really helps you understand the complexity of ourselves with our fancy schmancy big city poop holes and one-way kidneys.

[@sciencenerd7639]

Wow, I hadn't realized that so many flat worms were so beautiful. Many of these are as pretty as nudibranchs.

[@joshuaodiba]

It's kinda weird I fell in love with the intro song 😂😅😅

[@chanshiddendimple]

Thank you sir.. you put this on the day that i mostly needed

[@user-sn5hx7xc6p]

Oh no professor Dave knows the power of the infinitely cuttable flatworm, now he is INVINCIBLE 🧬😂😂
I just think it's kinda interesting that they have a Phyarnx and Pharyngoal cavity but evolution scrapped them of a circulatory system, always been fascinated by the flatworms

[@anuragpandey2004]

My favourite foreigner teacher.🥺❤️

[@jackhamerordewey9552]

I would love to see a music course. Maybe even just the basics oh how scales work, chords, circle of 5ths, ect. I know you are a musician.

[@ProfessorDaveExplains]

I will one day!

[@XariksBeatbox]

@@ProfessorDaveExplains you *must*

[@NigelCamden]

Great idea! I’d watch that for sure :)

[@user-pp1ye4eq3i]

Mashallah sir thanks ❤

[@VinsCool]

I love the derpy little eyes!

[@massey4business]

Professor Dave's a nerd. But he's my favorite nerd. 🤓 Thanks for the education professor Dave! 🤘🤘

[@fanievanniekerk8825]

Brilliant explanation thanks

[@VCV95]

Have you ever heard of Bogleech/ Jonathan Wojcik? I would love to see a biology team up to talk about worms. Plus his writing deserves a lot more eyes! He loves creepy crawlies more than anyone I have seen.

[@maiamaiapapaya]

platyhelminthes...my favorite phylum and the most fun to say!

[@uprightape100]

Just wondering.......what and when was the last common ancestor of Chordates and Platyhelminthes? Similarities abound.
Edit: according to the chart at the end, we're closer to Echinoderms. Wouldn't'a guessed that.

[@ryanhelcoski6894]

correct, we're both deuterostomes and we have an endoskeleton. We'll get to them eventually, but there's a lot to explore before then

[@pramodsingh7898]

Thanks

[@backstreetfan2887]

thanks so much, I love your content

[@mitzzzu_tigerjones444]

Haven’t even watched this video yet but here’s a thought I had on the John just to give you all of the image.…
If intelligent design is created using intelligence where did the intelligence come from?
Like, Any human that designs anything intellectually had to gather their knowledge from external sources so where did God gather it’s knowledge from if it’s using intelligence to design things?

[@ayatZaher-in6fc]

i hate zoology

[@KyleJarixManalang]

I hate you

[@EvolvedPrimate-nv6qx]

Zoology doesn't care

[@kpopstaners34]

Lmao same

[@Ibi_dagreat]

Real

[@waelfadlallah8939]

Hi professor Dave

[@ragibshahriar_715]

I think I will need to know more about flatworms

[@Joaza998]

You're really making me wanna go back to uni and finish marine biology 😂

[@rickkwitkoski1976]

Unlearning stuff from high school and university...
Nothing remains constant...

[@ProfessorDaveExplains]

Huh?

[@backstreetfan2887]

There have been some adjustments to taxonomy in recent years due to the fact that we have more DNA evidence, however, that is nothing to get discouraged about. That doesn't mean that the framework that we got in high school/university was useless. Science is just discovering more and more all the time. So it's not "everything I learned in school was wrong" it's "we know even more stuff now, cool!"

[@davyc412]

GET TO THE NEOBLASTS! GET TO THE NEOBLAAAAAASSSSSTSSSS! THAT'S WHY WE'RE HERE!!!

[@Shristy_singh_official]

Love from India🇮🇳

[@billyr2904]

I just realized your cladogram is missing a phylum, that being Acanthocephala. Xenoturbillina and acoelomorpha, should really be shown on the cladogram as the phylum xenacoelomorpha, instead of xenacoelomorpha broken into its separate 'classes'. The phylum Acanthocephala, commonly known as spiny-headed worms, are from my research most closely related to the rotifers of the phylum rotifera and are are a sister taxa to that group. Which also means they are part of the spiralian clade called gnathifera, which I pronounce the g in it, because it is of Greek origin, and all letters in a Greek word are pronounced, with the greek for jaw being, γναθος. But the modern Greek is σαγόνι.

[@billyr2904]

@einmaniac I actually just found that out very recently, and I was a bit surprised that spiny-headed worms, aren't there own separate phylum.

[@darshankumar525]

I want notes

[@gayatrigitay6592]

Please upload the all phylum and subclass of animal kingdom...

[@ProfessorDaveExplains]

That's the plan, bud.

[@russiandragon45]

Imagine being a flat worm and pooping out your mouth 🤮
Their eye spots look so cute though.

[@WhiteOak09]

Don't care for worms, C ya wouldn't want to be ya 🏎🏇.

[@mikecane6501]

Ok

[@CelliniCreations]

"Worm enthusiast... :D

[@cedricvillani8502]

I’m now slightly dumber after watching this! 😮

[@user-mb1wn4xu2m]

Too many words I don't understand

[@-JA-]

👍🙂