Prior to using this narrative, have learners create their own model of a cell in their notebooks using whatever background information or experience they might have. While exploring the narrative, ...

Muscles are formed by the merging of many small myoblasts into larger myofibers. This fusion of mononucleated myoblasts with a single nucleus into multinucleated myofibers with multiple nuclei is an ...

Enzymes called RNA polymerases transcribe DNA into RNA. RNA is the intermediary that carries the information contained within DNA to the ribosomes, where the genetic information is synthesized into ...

Pyramidal neurons are a very common type of neuron in the brain. Their cell bodies have a unique pyramidal shape that is the source of their name. They make up about two-thirds of all neurons in the ...

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 ...

With its tousled coif, this caterpillar would fit right in at a “wild hair day” event – but not for long, because it will soon transform into a unique-looking moth. Learn more Get a closer view of the ...

This cross section through the flight muscles of a dancer damselfly shows in blue the muscle fibers that the fly uses to flap its wings. You can also see the nerve that stimulates these muscles in red ...

This seemingly red-hot macrophage is one of the key components of the human immune system. These cells identify, engulf, and destroy pathogens and allergens that enter our bodies and clean up cellular ...

Unlike prokaryotic cells, all eukaryotic cells have nuclei. Nuclei house most of a cell’s genetic information – much of it in the form of DNA – making a nucleus a sort of blueprint for building future ...

Imagine going to the dentist with this set of teeth! These are teeth located on a snail’s “tongue,” or radula, also called a rasper, which is constantly licking the ground to scrape up and transport ...

Crane flies generally do not eat once they’re adults, but they do drink – and this labrum, or mouthpart, of a crane fly is well adapted to a liquid diet. Although crane flies look like giant ...

These worm larvae may look pretty, but you should keep your distance. Once they get a little more mature, they could infect you and make you sick. The circular and oval shapes in the center of this ...