Examlex
What is a virtual private network (VPN)? Explain how VPNs ensure the security of transmissions.
Dentin
A hard, dense, bony tissue forming the bulk of a tooth beneath the enamel.
Enamel
The hard, outermost layer of a tooth that protects against decay and is the hardest substance in the human body.
Photomicrograph
An image taken using a microscope to show a magnified view of a tiny object.
Duodenum
The first section of the small intestine immediately beyond the stomach, responsible for the initial breakdown and absorption of nutrients.
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