This abstract array of blue, green, and orange swirls depicts an important bodily system, the lymphatic system, which produces immune cells and transports them throughout the bodies of all vertebrates ...

The green specks in this image are particles of the Middle East respiratory syndrome (MERS) coronavirus; the red in the background is a kidney cell in culture. This is a rare virus from the same ...

These little red salmonella bacteria are one of the main causes of food poisoning. If you ingest enough of these bacteria, they can infect your intestinal tract and lead to serious illness. These ...

What am I looking at? This is a single human hepatocyte. Its two nuclei are in blue (1). The other colors in this image are stains of the actin protein and are depth-coded, with red being the closest ...

While this image might look like a multicolored tile floor, it is actually a cross section through the fingerlike bumps on the intestinal wall called villi. The cells within the villi, which you can ...

You may think of the small intestine as a smooth tube that winds its way through your abdomen. But if you were to look really closely at the inside of the intestine, you would see that it is lined ...

This furry face belongs to the caterpillar of an Automedon giant owl butterfly – which calls the forests of South America home. The butterfly that this caterpillar will transform into has striking ...

This neon marvel highlights the muscles of a developing aquatic invertebrate known as a moss animal, also known as a bryozoan – a member of the phylum Bryozoa. The organism gets its common name from ...

This intricate structure of blue rods and red dots is a cross section through the eye of a damselfly. Insects’ compound eyes are structured very differently than the eyes of humans and other mammals, ...

Neurons communicate with each other and with other cells all over the body. Before they can do this, neurons need to establish a connection with their communication partners. They send projections ...

Skeletal muscle cells are long and thin and can contain multiple nuclei. These cells fuse end to end with their neighbors to form myotubes, which then collectively form muscle fibers. When bundled ...

Do you notice the tiny red-ringed dots in this image? Those little spots are HIV particles. They are concentrated on contact points in the brain between an infected immune cell and an uninfected ...