@sf_microscopy: Replying to @Rosey I absolutely love kiwis, but every time I eat them, my mouth gets a little itchy! Kiwis, like many other tropical fruits, have large amounts of calcium oxalate crystals contained in idioblast cells. These crystal needles, known as raphides, serve as a defense mechanism. They are designed to protect the seeds inside the fruits from herbivores looking for a quick snack! Humans are a bit too big for these needles to serve as great defense mechanisms, so we are good to go! #microscope #microbiology #underthemicroscope #microscopy #microcosmos #nature #kiwi #crystals #kiwi🥝 #fyp #fypage #fypシ