#digestive system
Esoph-egg-us
✅Non-keratinized stratified squamous epithelium
✅Circumscribing muscularis mucosae
✅Submucosal glands
✅Dual layered muscularis externa
It’s just not Spring until you have painted your very own Esoph-egg-us
So get cracking and I don’t want to hear any eggscuses
#histology #science #pathology #pathologists #anatomy #autopsy #eggs #easter #spring #biology #esophagus #digestive #premed #meded #nurse #nursing #medschool #medstudent #medicine #education #vetscience #vetschool #dentistry #histotechnology #histologica #histotech #histo #pathArt #sciArt #ihearthisto
Kitty Liver
Check meowt!
I’m a purrfect hepatic vein surrounded by hepatic lobules!
This is a hematoxylin and eosin stained slice through a liver that was injected with carbon/ink prior to fixation.
The liver is compose of numerous roughly hexagonal shaped lobules. Each lobule has a venule at its center (the central vein; top right) and a series of hepatic triads at its periphery. A triad is a collection of three structures - in this case branches of the hepatic artery, hepatic portal vein and hepatic duct.
Blood in the hepatic artery (oxygenated) and hepatic portal vein (rich in nutrients absorbed from the intestines) travels in sinusoids (the many narrow white spaces in this image) towards the central vein of each lobule. On its way through the sinusoids the blood is processed by the the many hepatocytes that line this region (the pink cells).
Within the sinusoids reside many liver macrophages (Kupffer cells) that phagocytose debris traveling through sinusoids. Normally these cells are invisible in standard H&E preparations but recall that this tissue was injected with ink! The ink was phagocytosed by the macrophages filling their cytoplasm with carbon so that they are now visible as black cells in the sinusoids.
Once the blood enters the central vein of each hepatic lobule they drain into the hepatic veins (kitty!) until the blood reaches the inferior venal cava.
In this way all blood, rich in raw nutrients and toxins absorbed from the GI tract is processed by the liver before it enters the systemic circulation!
Pawsitively unbeliverable!
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Ghostface Killer is back!
Only this time he’s hiding in a rectum!
Scaring while you’re learning!
A rectal scrape is performed (more often in veterinary med) to obtain a sample of the epithelial cells lining the rectum. These are observed in the microscope for abnormal changes or for microbes and their eggs/larvae that might be present in the digestive tract.
This particular scrape contains an epithelial cell that appears to be bi-nucleate and is surrounded by red blood cells.
Lethargic & lazy and all I could see was a future of getting larger, lazier & less healthy. I saw a future that I wanted no part of. So I made a single change to my daily routine.
That one change, changed everything! It helped me reduce the amount of sugar & fat I was eating, improved my digestion, calmed my aches & increased my energy. Now at 48 I can honestly say that I’m in the best shape of my life…and getting better!
Fig. 48. Digestive system of grain-eating birds. La vie : physiologie humaine appliquée à l'hygiène et à la médecine.1874.
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Slim Goodbody was something I used to watch on tv as a kid in the 1970s, but I hadn’t quite remembered the dated mix of strange and wonderful that makes the bodysuit so iconic… until we watched this clip.
The Digestion Song
If you’re looking for the definitive video explaining the science of the digestive system, here it is.
We do have another digestive system video in our archives, but it’s true: it does not dance and sing.
I remember these from elementary school. Slim Goodbody scared me a little, as I recall, but I’ll show it to my kids nonetheless.
I loved these crazy shows!
