In biology the relationship of what eats what and how energy passes through an ecosystem is called a food chain. Pyramids can help give us an overall picture of a particular food chain.

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 ...

What am I looking at? These images are a series of 1-millimeter-thick slices from front to back through the brain of a mouse, with ChAT neurons (1) in purple and pyramidal neurons (2) in green. The ...