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The actual rates of diffusion and perfusion, and the solubility of gases in specific tissues are not generally known, and vary considerably. However mathematical models have been proposed which approximate the real situation to a greater or lesser extent, and these decompression models are used to predict whether symptomatic bubble formation is ...
Diffusion is the net movement of anything (for example, atoms, ... An example of a process where both bulk motion and diffusion occur is human breathing. [2]
Gas exchange is the physical process by which gases move passively by diffusion across a surface. For example, this surface might be the air/water interface of a water body, the surface of a gas bubble in a liquid, a gas-permeable membrane, or a biological membrane that forms the boundary between an organism and its extracellular environment.
Migrationism explains cultural change in terms of human migration, while diffusionism relies on explanations based on trans-cultural diffusion of ideas rather than populations (pots, not people [1]). Western archaeology the first half of the 20th century relied on the assumption of migration and invasion as driving cultural change.
Real-time magnetic resonance imaging of the human thorax during breathing X-ray video of a female American alligator while breathing. Breathing (spiration [1] or ventilation) is the rhythmical process of moving air into and out of the lungs to facilitate gas exchange with the internal environment, mostly to flush out carbon dioxide and bring in oxygen.
Regeneration in humans is the regrowth of lost tissues or organs in response to injury. ... to regenerate hollow organs and tissues with a long diffusion distance ...
Alexander Goldenweiser in Culture: The Diffusion Controversy stated that there are reasons for believing that culture may arise independently rather than being transmitted. In addition, Goldenweiser insists that behavior is primitive and that cultural similarities may arise simply because they are reflections of adaptive traits that all human ...
Glucose transporters are a wide group of membrane proteins that facilitate the transport of glucose across the plasma membrane, a process known as facilitated diffusion. Because glucose is a vital source of energy for all life, these transporters are present in all phyla.