Dec. 18, 2024 — Scientists have generated human stem cell models which contain notochord -- a tissue in the developing embryo that acts like a navigation system, directing cells where to build ...

Courtesy a Private Collector and Mona Lee Nesseth, Custom Estate Jewels Spinel, like garnet and diamond, is singly refractive, with the same physical properties in all crystal directions. It belongs ...

Receptors are groups of specialised cells. They detect a change in the environment (stimulus) and stimulate electrical impulses in response. Sense organs contain groups of receptors that respond ...