This is an example of epidural hemorrhage. The blood accumulates on the outside of the dura mater. The bleeding usually has a disk shape and it originates by the rupture of an artery.
Subarachnoid hemorrhage. When a blood vessel reptures over the base of the brain the blood accumulates on both sides of the brain. This can be readily observed as soon as the skull and dura mater are removed.
The Internet Looks Like a Fractal Dandelion
In 2004 Barrett Lyon’s friends bet him $50 that he couldn’t map the entire Internet in a day. Within two weeks the self-described technologist and entrepreneur had created a program that could output a detailed visualization of Internet connectivity in a few hours. Seven years and billions more Internet-connected devices later, Lyon is still at it. This cosmic-looking image, one of his newest creations, traces the millions of routes along which data can travel and pinpoints the hubs receiving the most traffic. Internet giants such as AT&T and Google manage the most heavily used networks, which appear here as glowing yellow orbs; they tend to concentrate in the center of the sphere. The less popular local networks (red) sit on the periphery. Although Lyon’s visualizations have appeared in computing textbooks and at the Museum of Modern Art in New York, he says he has yet to collect on his bet.
Fibroblasts are connective tissue cells responsible for synthesizing the extracellular matrix, which is essential in regulating intercellular communication. These cells synthesize collagen and elastin, essential proteins that provide tissues with structural support and elasticity, respectively.
The terms “fibroblast” and “fibrocyte” refer to the same type of cell, the former (suffix -blast) referring to the metabolically activated state. Fibroblasts function in wound healing by reconstructing the extracellular matrices in new tissue formation.
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Fertilization of an egg cell.
