#epithelium

[callimara]

Trick or treat?

Uhh, uhh, HAVE SOME HISTOLOGY DRAWINGS?!

[bpod-bpod]

Aggressive Features

Features that differentiate highly metastatic breast cancer cells from less aggressive forms revealed. The epithelial-mesenchymal transition defines changes that cells undergo when becoming invasive, whether during tissue development, wound healing or cancer progression. This study shows that highly metastatic cells bear a hybrid of epithelial and mesenchymal characteristics

Read the published research article here

Video captured with Leica Microsystems technology

Video from work by Mary E. Herndon and colleagues

Department of Biology, University of Iowa, Iowa City, IA, USA

Video originally published with a Creative Commons Attribution 4.0 International (CC BY 4.0)

Published in Disease Models & Mechanisms, September 2024

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[glamstudynotes]

Types of Epithelia

[cyarsk5230]

Fuck them!

[quotesfrommyreading]

Smell is the most direct of the senses. Aromas must literally enter the body before they can be consciously identified. With every inhalation, molecules travel through the thin craggy pathways that begin at the nostrils and head toward the brain. They speed past the olfactory cleft, a narrow opening toward the top of the nose. They hit the olfactory receptors, which are housed on the hairlike tips of the millions of neurons that peek through a gold-hued mucous membrane called the olfactory epithelium.

Every human has around 350 different types of these receptors, which are unique proteins on both the left and the right side of the upper nostrils. These receptors are the gateway to the complex dance of perception. They connect to the smell molecules upon arrival and then transfer signals toward the brain by chemical impulse. Every human has between six and eight million neurons in the nose to do just that. These signals are fired rapidly, by many neurons at a time, forming a pattern not unlike a line of musical notes, or the HTML coding of a webpage. When combined, the brain interprets the signals as a smell, an “odor image”.

These patterns are both complicated and minute. Scientists have found that if the chemical structure of two smells are identical except for just one carbon atom, the patterns sent in response are nonetheless distinguishably altered. Nonanoic acid, for example, is a nine-carbon chain that yields the salty smell of cheese. Decanoic acid, with only one carbon atom added to its structure, however, smells rancid, like sweat.

These patterned signals travel on pathways made by neurons, which snake from the nose through a thin sheet of bone called the cribriform plate, and are deposited in the olfactory bulb, which lies toward the bottom of the brain. The bulb takes these patterns, like reading the score of a piano concerto or lyrics to a lullaby, and sends them farther on to the olfactory cortex. The cortex, in turn, relays an interpretation to other parts of the brain like the thalamus, which deals in conscious perception, and the limbic areas, for emotional response.

  —  Season to Taste: How I Lost My Sense of Smell and Found My Way (Molly Birnbaum)

[hurdy-girly]

Hey girl, are you a microscopic slide of stratified cuboidal epithelium? Cause. You look like a kiwi.

[ainawgsd]

Husband went to the doctor for allergy testing today.

He's allergic to dogs

[humancelltournament]

Human Cell Tournament Round 1

Propaganda!

Simple columnar epithelium is a single layer of columnar epithelial cells which are tall and slender with oval-shaped nuclei located in the basal region, attached to the basement membrane. In humans, simple columnar epithelium lines most organs of the digestive tract including the stomach, and intestines. Simple columnar epithelium also lines the uterus. Simple columnar epithelium is further divided into two categories: ciliated and non-ciliated (glandular). The ciliated part of the simple columnar epithelium has tiny hairs which help move mucus and other substances up the respiratory tract. The shape of the simple columnar epithelium cells are tall and narrow giving a column like appearance.

In immunology, a memory B cell (MBC) is a type of B lymphocyte that forms part of the adaptive immune system. These cells develop within germinal centers of the secondary lymphoid organs. Memory B cells circulate in the blood stream in a quiescent state, sometimes for decades. Their function is to memorize the characteristics of the antigen that activated their parent B cell during initial infection such that if the memory B cell later encounters the same antigen, it triggers an accelerated and robust secondary immune response. Memory B cells have B cell receptors (BCRs) on their cell membrane, identical to the one on their parent cell, that allow them to recognize antigen and mount a specific antibody response.

[bloodfestgf]

don’t look at the tags I talk about something icky there

[forgotn1]

I think that bong rip pulled smoke into parts of my lungs I haven't used in 20 years. Damn.

[birdyverdie]

ciliated means that it can move stuff over itself. Makes sense because cilia is an organelle that moves mucus over the cell. On another note it's related to a flagella except it doesn't move the cell itself. nonciliated is the opposite of that see this is easssyyy

[bpod-bpod]

Stem Cell Lining

Importance of the epigenetic regulators (modifiers of DNA activity) KAT2A and KAT2B in maintaining stem cells that renew the intestinal lining which is key for survival

Read the published research article here

Image from work by Mai-Uyen Nguyen and colleagues

Department of Genetics, Rutgers, The State University of New Jersey, Piscataway, NJ, USA

Image originally published with a Creative Commons Attribution 4.0 International (CC BY-NC 4.0)

Published in Science Advances, August 2024

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[battlestarbones]

sorry OP but the rest of your organs are absolutely NOT covered in mucus! only surfaces exposed to the outside environment or lining an organ make mucus (nose, sinuses, mouth, the inside of your lungs and digestive tract, vagina, etc.) because mucus serves a protective function. all of your other internal organs (heart, outside of lungs, liver, spleen, kidneys, outside of digestive tract, etc.) are either a) directly attached to adjacent structures or b) covered in a layer of serosal tissue (pleura, pericardium, peritoneum) that slides against another layer of the same tissue with a thin layer of fluid in between. this fluid is produced by blood filtering out of capillaries and is not mucus.

Hey do you know alot about internal organs. Cause if so then i have a pretty specific question.

Are... are your organs covered in blood??? Since blood tends to flow thru the blood vessels, and if your body is healthy and all your blood vessels are imtact then your organs shouldn't be covered in blood, right? But just saying that feels wrong.

No, unless you are actively experiencing internal bleeding then your organs are not covered in blood. They are however wet, but it's cerebrospinal fluid and mucus that keeps them that way.

[aerospaceaspirant]

Infinite in Both Directions

@sketiana // cells undergoing mitosis // neutron stars colliding // 'saturn', sleeping at last // voyager golden records // diagram of an atom // diagram of the solar system // 'a toast to the alchemists', laura giplin // neural stem cells // ciliated ventral epithelium // 'constellations', the oh hellos // jwst deep field // 'singularity', marie howe // heart of the phantom galaxy // 'zephyrus', the oh hellos // apoferritin // aerial view of a forest // a graph me and my project co-chair made to model angle over time of our payload // molybdenum and sulfur atoms // unknown // pillars of creation

[hammy-fan]

i need to cram

[iubians]

70 Top Basic Histology Quiz Online Practice Test

Challenge yourself with our Histology Quiz and MCQs Questions to explore the fascinating world of tissues and cells. Put your knowledge to the histology practice quiz test now! Histology Quiz Topics Connective Tissue Histology Quiz Histology Quiz On Tissue Identification Endocrine Histology Quiz Digestive System Histology Quiz Histology Epithelial Tissue Quiz Histology Quiz…