Small Intestine Anatomy (Parts, Topography, Structures, Layers)

Content:
Introduction 0:00
Small Intestine Overview: 00:40
Duodenum: 01:14
Jejunum and Ileum: 03:39
Anatomical Structures of the Duodenum: 6:48
Anatomical Structures of Jejunum and Ileum: 9:35
Layers of the Small Intestinal Wall: 10:25
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Small Intestine Overview:
- Small Intestine goes from the Pylorus to the Caecum
- Approx 7 meters long in adults
- Parts of the small intestine: Duodenum, Jejunum, Ileum
Duodenum:
- 20-30cm
- Responsible for Iron Absorbtion, Chemical Digestion, Chemical Neutralization
- Processes Chyme from the stomach
Topography of the Duodenum:
- Skeletopy: From L1 to L3
- Syntopy:
○ Behind Duodenum: Inferior Vena Cava, Aorta, Right Kidney
○ Above Duodenum: Liver, Pancreas
○ Anteriorly: Transverse Colon
- Holotopy: Epigastric Region and Umbilical Region
Jejunum and Ileum:
- No strict demarcation between jejunum and ileum
- Jejunum (2-3 meters long)
○ Primary Function: Absorbtion
- Ileum (2-4 meters long)
○ Absorbs remaining nutrients and vitamins (vitamin b12)
Topography of the Jejunum and Ileum:
- Skeletopy: L2 to Right Iliac Fossa
- Syntopy:
○ Surrounded by Caecum, Ascending colon, transverse colon, descending colon and sigmoid colon
○ Posteriorly: Fixated to posterior abdominal wall through the root of the mesentery (Radix Mesenterii)
○ Anteriorly: Greater Omentum
- Holotopy:
○ Ileum: Umbilical and left lateral region
○ Jejunum: Left Lateral Region, Right Inguinal Region, Pubic Region
Anatomical Structures:
- Duodenum:
○ Superior Part
§ from Pyloric Orifice (Ostium Pyloricum)
§ To Superior Duodenal Flexure (Flexura Duodeni Superior)
○ Descending Part
§ From Superior Duodenal Flexure (Flexura Duodeni Superior)
§ To Inferior Duodenal Flexure (Flexura Duodeni Inferior)
○ Inferior Horizontal Part
§ From Inferior Duodenal Flexure (Flexura Duodeni Inferior)
○ Ascending Part
§ Until Duodenojejunal Flexure (Flexura Duodenojejunalis) / Ligament of Treitz
- Jejunum:
○ Wider, Thicker than Ileum
○ More vascular
○ Darker in colour
- Ileum:
○ Thinner
○ Less Vascular
○ Lighter in Colour
Layers of the Small Intestinal Wall:
- Tunica Mucosa
○ Made up of Simple Columnar Epithelium
○ Circular Folds (Plicae Circulare) absent in the duodenal bulb (bulbus duodeni)
○ Intestinal Villi (Villi Intestinales)
○ Microvilli
○ Intestinal Glands (Glandula Intestinales)
○ Solitary Lymphoid Nodules (Noduli Lymphoidei Solitarii)
○ Aggregated lymph nodules (Noduli Lymphoidei Aggregati)
○ AT the duodenum:
§ Major Duodenal Papilla (Papilla Duodeni Major)
§ Minor Duodenal Papilla (Papilla Duodeni Minor)
- Tela Submucosa
○ Duodenum: Brunners Glands
○ Jejunum: Longer Villi
○ Ileum: More goblet cells in mucosa and has Peyers Patches (GALT)
- Tunica Muscularis
○ Provides Peristaltic movement (peristalsis)
○ Inner Layer: Circular Muscle Layer
§ Hepatopancreatic Sphincter (Sphincter of Oddi) (M. Sphincter Ampullae Hepatopancreatica)
○ Outer Layer: Longitudinal Muscle Layer
- Tunica Serosa
○ Intraperitoneal Organs (Peritoneum)
○ Retroperitoneal Organs (Duodenum) has tunica adventitia at some parts
Sources used in this video:
- Memorix Anatomy 2nd Edition by Hudák Radovan (Author), Kachlík David (Author), Volný Ondřej (Author)
- Biorender
- University notes and lectures

Пікірлер: 78

  • @TaimTalksMed
    @TaimTalksMed5 ай бұрын

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  • @yaraaavlog
    @yaraaavlog Жыл бұрын

    thank u sooooooooooooooo much🥰🥰🥰🥰 I cannot be more grateful .Besides, literally you made me skip all the lectures and classes of Anatomy with there boring DRs LOL😂😂😂😂🤭🤭🤭🤭

  • @TaimTalksMed

    @TaimTalksMed

    Жыл бұрын

    Happy to hear! 😂🥳

  • @user-kd9zh5po8m
    @user-kd9zh5po8m Жыл бұрын

    I appreciate the research and information you provided in this video. It's enlightening and thought-provoking. Thanks for sharing!

  • @chavindiperera9181
    @chavindiperera918110 ай бұрын

    Thank you and your work is much appreciated😊. I'm a first year med student and your videos has helped me understand better and perform well in exams.

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    @tianagoulbourne2439 ай бұрын

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  • @fritac1618
    @fritac16182 жыл бұрын

    Thanks! Really good and informative video

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    @adamserhan8896 Жыл бұрын

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  • @KitchenwithAdeela321
    @KitchenwithAdeela321 Жыл бұрын

    Thanks for great and easy explanation

  • @uduakobongnatanail5584
    @uduakobongnatanail55842 жыл бұрын

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  • @elizabethromanova4253
    @elizabethromanova4253 Жыл бұрын

    Perfect explenation! 🥰

  • @jafarabdullahi5931
    @jafarabdullahi59317 ай бұрын

    Superb illustration! Can you please include vasculatures and applied anatomy of the organs in subsequent videos. Thank you 😊

  • @siilegmaadorjpalam2292
    @siilegmaadorjpalam22928 ай бұрын

    Thank you so much from first year med student in Mongolia❤

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    @bigsoso2011 ай бұрын

    Brilliantly done

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    @swan6959 Жыл бұрын

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  • @amakaakajiugo1640
    @amakaakajiugo16402 жыл бұрын

    Very nice video, I always do find your videos super easy to understand, but it would me nice if you add the arterial blood supply and venous drainage, thanks

  • @TaimTalksMed

    @TaimTalksMed

    2 жыл бұрын

    Glad to hear! I've had to separate them to not make the video too long! But I might make a summary video of each organ in the future =)

  • @bakrimalek4696

    @bakrimalek4696

    2 жыл бұрын

    @@TaimTalksMed awesome as always.

  • @vindhiya8480
    @vindhiya8480 Жыл бұрын

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    @user-ft6ic8ce4p Жыл бұрын

    brief but very useful ♥

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    @prodiptushar66806 ай бұрын

    It was a really informative and amazing presentation, Thank You, Sir

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    @oliviaperez8752 Жыл бұрын

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    @user-kd9zh5po8m

    Жыл бұрын

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    @chaimahmd97512 жыл бұрын

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  • @TaimTalksMed

    @TaimTalksMed

    2 жыл бұрын

    Glad you found it helpful! 😊

  • @rivergirl5827
    @rivergirl58272 жыл бұрын

    thanks alot ,explanation was perfect

  • @TaimTalksMed

    @TaimTalksMed

    2 жыл бұрын

    You're welcome! Glad you found it helpful =)

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    @hirushanmadoosha87624 ай бұрын

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    @MuhammadUmer-uw2zm3 ай бұрын

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  • @TaimTalksMed

    @TaimTalksMed

    3 ай бұрын

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    @shanimunasinghe9582 жыл бұрын

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    @fereerfswe81956 ай бұрын

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    @hakaromer2 жыл бұрын

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    @motomvАй бұрын

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    @Rain.Rain20212 жыл бұрын

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    @mahapalm29792 жыл бұрын

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    @bakrimalek46962 жыл бұрын

    I Thank you 😊

  • @TaimTalksMed

    @TaimTalksMed

    2 жыл бұрын

    Glad you found it helpful! 😄

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    @user-tg1bo7ov8j Жыл бұрын

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    @sameerbhaya8208 Жыл бұрын

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    @aliwmodysow9612 Жыл бұрын

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  • @konstantinvalchev4497
    @konstantinvalchev4497 Жыл бұрын

    The picture of the tunica muscularis at 17:15 is a bit misleading - it shows the longitudinal muscle layer as being the inner one and not the circular :) The circles represent the longitudinal as they run along the lenght of the intestine. ps:Amazing video!

  • @ogsooni6380
    @ogsooni63802 жыл бұрын

    thanks sir this is helpful

  • @IsaacPahuwa
    @IsaacPahuwa Жыл бұрын

    cool

  • @sergeyshchurko9541
    @sergeyshchurko95415 ай бұрын

    It will be much clearer if these are not posters and drawings, but the processing of a CT examination of a specific person. Moreover, such opportunities have already existed for a long time.

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    @ishameza8662 жыл бұрын

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    @mohammadsufyan8677 Жыл бұрын

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    @birhatyouns2004 Жыл бұрын

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    @joelvon94943 ай бұрын

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    @pattystueber965510 ай бұрын

    if you been diagnosed with smas and had it repaired, will you assume you will be normal again?

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    @MaryamZulmay-ly9tu Жыл бұрын

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    @ahnaf_akif_mbbs_bd_ksa9 ай бұрын

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  • @user-us5xx5tr1c
    @user-us5xx5tr1c Жыл бұрын

    Hello my dear friends! Do you know where I can find the text of this video!?

  • @TaimTalksMed

    @TaimTalksMed

    Жыл бұрын

    I've written a summary text in the description :)

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    @radwandawod10512 жыл бұрын

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  • @ErwinSchaillee
    @ErwinSchaillee11 ай бұрын

    Tbe info is. Very interest8ng .... but speed and language used is not ok for non-medicine students

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    @tota11324 Жыл бұрын

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  • @shemelesmekonen8888
    @shemelesmekonen88882 ай бұрын

    One year ago, on May 7, 2024, I was vomiting and when I went to the clinic, I was told that I had extra bowel Ye threat does he have

  • @bakrimalek4696
    @bakrimalek46962 жыл бұрын

    1

  • @sahar1usa
    @sahar1usa2 ай бұрын

    Please cover the overview first without going into too much detailed that are not v useful . I appreciate

  • @Abood-cl3zi

    @Abood-cl3zi

    2 ай бұрын

    But we need the details

  • @conniechan3280
    @conniechan3280 Жыл бұрын

    Thanks

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    @abdallasiddig55422 жыл бұрын

    Thanks