Do you recognize the shape of this yellow tree-like structure? If you guessed a kidney, you are correct! It is the collecting duct system, which funnels urine from the kidney to the bladder. And what ...

This blue skate’s skeleton is made up of the same stuff as your nose and ears – cartilage. However, parts of a skate’s skeleton, such as the skull and spine, are strengthened by minerals, resulting in ...

An axon is the part of a neuron that sends a signal to other cells. Axons extend from the cell body to contact other cells, generally forming synapses between the two cells. These axons can be very ...

Every process has a beginning and end, but sometimes the middle segment is the most interesting. This is an image of a neural stem cell in the midst of the process of differentiating into a neuron. In ...

During development, cells move around constantly. Often, specific cell types arise in one area of the developing organism but then need to migrate to another destination as the organism grows and ...

Confetti mice are very useful in research because they allow scientists to track which cells produce which proteins based on their color under a fluorescent microscope. These mice are particularly ...

This image shows two different organisms, an alga and a plant, both of them intriguing to look at under a microscope. The rod-shaped creature is a type of alga called a desmid. It is set against the ...

This is the underside of a gecko, offering a great view of their incredible feet and toes, which allow them to climb on nearly any surface. Get a closer view of the image Get a closer view of the ...

In some cultures, a rabbit’s foot is thought to confer good luck. Here, however, you’re looking a a sample of a rabbit’s skin. Researchers have learned a great deal about rabbit skin by examining ...

These dark blue tubes splattered with red and green are fruit fly muscles. This image shows where the nerves and the muscles meet in the larva of a fly. These dark blue tubes splattered with red and ...

What would you see if you peered inside a human small intestine? Here’s a glimpse at its structure, revealing a community of cells with different functions. A biopsy like this is generally very small ...

This time-lapse video shows the development of the nervous system in a fruit fly embryo as it transitions to the larval stage. Fruit flies have a high reproduction rate and a very short gestation ...