16. Cervical cancer cells.
Cervical cancer is caused by the abnormal growth of cells in the cervix. These cells usually form malignant tumours in the cervix and have the ability to migrate or spread to other parts of the body.
Up close, cancerous cell division inside the cervix looks like this:
17. Mushroom spores.
Mushrooms are spore-bearing; meaning they have tiny reproductive cells that allow the fungus to replicate and grow. Spores can be used to identify whether or not a mushroom is edible, and as such are important in the study and consumption of the fungus. These oval-shaped nuggets are the spores on the surface of a mushroom, magnified and seen through an electron microscope.(source)
18. Bread mold.
Bread is perfect for supporting mold growth due to its moistness and ingredients. Mold spores, in fact, are everywhere in the air around us, and it does not take much effort for one of these to settle on bread and reproduce. Mold multiplies like crazy; it can double in size in as little time as an hour. This extraterrestrial plant form is actually the fruiting head of a mold spore on bread.(source)
19. Snail shell.
A snail’s shell has three major layers: the periostracum, the ostracum, and the smooth innermost layer contained in the snail’s body. This is a magnified image of a snail’s periostracum, the hard outermost layer that gives the shell most of its colouring and protects the softer layers from damage due to its abrasion-resistant properties.(source)
20. Spider silk glands.
The silk produced by spiders is a type of protein fibre that they use to trap prey, escape predators and build nests for their offspring. A single silk gland, as seen in this magnified image, contains spinnerets; tubule-like structures from where silk is shot out. Depending on the species, spiders may have two to eight spinneret pairs.(source)