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All moral rights asserted. Recolouring or alteration of the image is prohibited without permission. Light micrograph of a section through a duodenum, the beginning of the small intestine, which runs from the stomach to the large intestine. It is where digestion begins and nutrients are absorbed into the blood. The interior (lumen, left) is lined with villi, which are folds in the intestinal surface that greatly increase the surface area for absorption. Also within the surface are crypts of Lieberkuhn (red-lined ovoids), which secrete enzymes into the lumen that help to digest the food. Underlying this layer is the muscularis mucosae (thin violet line) and connective tissue (blue). Across bottom are layers of smooth muscle and then circular and longitudinal muscles that contract and relax to move food through the duodenum. Magnification: x100 when printed at 15 centimetres wide.

Health

Irritable bowel syndrome may be caused by overreacting gut cells

Epithelial cells in the gut remain active in mice even after an irritant clears, which may be the source of chronic gut pain associated with irritable bowel syndrome

News

Melbourne, Victoria, Australia, August 30 2021: Covid vaccination sign. Queues of people waiting to get coronavirus vaccine outside Peanut Farm St Kilda walk-in covid-19 vaccination clinic. ; Shutterstock ID 2032774577; purchase_order: NS online; job: Photo; client: NS; other:

Health

Anti-vaccine views may soften after people hear extreme implications

News

A woman flees from the polluting foam generated by a river full of waste, at the entrance of her house, in Mosquera, Colombia April 27, 2022. REUTERS/Luisa Gonzalez TPX IMAGES OF THE DAY - RC2RVT90Q4JF

Environment

Toxic foam from polluted rivers causes health problems in Colombia

News

WASHINGTON JUNE 27: A pro-choice activist holds a Planned Parenthood sign while awaiting the Supreme Court???s ruling on abortion access in front of the Supreme Court in Washington, DC on June 27, 2016; Shutterstock ID 443763643; purchase_order: NS online; job: Photo; client: NS; other:

Health

How repealing Roe v Wade in the US will lead to more women’s deaths

Analysis

Neurologist doctor analysing nervous system using eeg headset scanning woman brain. Scientist researcher using high tech developing neurological innovation, monitoring side effects on monitor screen; Shutterstock ID 1955759332; purchase_order: -; job: -; client: -; other: -

Mind

Your brain may have a warning system that suppresses unwanted thoughts

News

How interior design choices can boost your mental and physical health

Humans

How interior design choices can boost your mental and physical health

Features

Face of Rhesus Macaque Monkeys; Shutterstock ID 1754084492; purchase_order: -; job: -; client: -; other: -

Health

Interoception: Monkeys can sense their own heartbeat just like us

News

Nerve demyelination. Coloured transmission electron micrograph (TEM) of a section through a Schwann cell and a nerve fibre, showing the early collapse of its myelin sheath. Myelin (red) is an insulating fatty layer that surrounds the nerve fibre (axon, orange), increasing the speed at which nerve impulses travel. It is formed when a Schwann cell (green) wraps around the fibre, depositing layers of myelin between each coil. Demyelination occurs in nerve disorders such as multiple sclerosis (MS). Patches (lesions) of myelin sheath are destroyed and nerve function is impaired. Magnification: x3800 when printed 10 centimetres wide.

Health

MS reversed by transplanted immune cells that fight Epstein-Barr virus

News

Can a phone app really be your therapist?

Technology

Can a phone app really be your therapist?

Comment

How do we decide what counts as trauma – and have we got it all wrong?

Health

How do we decide what counts as trauma – and have we got it all wrong?

What qualifies as trauma has become a hotly debated issue, with implications for treating people who experience PTSD – and the way we respond to things like the pandemic and police killings

Features

Health

Drugs seem to help regenerate mouse lungs damaged by cigarette smoke

News

Health

Hugging a pillow that mimics breathing could reduce anxiety

News

Health

Middle-age spread isn't down to metabolism, but we know how to beat it

Features

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The hidden cause of premature ageing: Advanced Glycation End products

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