Answer:the valves prevents the backward flow of blood
Explanation:
Answer:
convention cells
Explanation:
In the field of fluid dynamics, a convection cell is the phenomenon that occurs when density differences exist within a body of liquid or gas. These density differences result in rising and/or falling currents, which are the key characteristics of a convection cell. When a volume of fluid is heated, it expands and becomes less dense and thus more buoyant than the surrounding fluid. The colder, denser part of the fluid descends to settle below the warmer, less-dense fluid, and this causes the warmer fluid to rise. Such movement is called convection, and the moving body of liquid is referred to as a convection cell. This particular type of convection, where a horizontal layer of fluid is heated from below, is known as Rayleigh–Bénard convection. Convection usually requires a gravitational field, but in microgravity experiments, thermal convection has been observed without gravitational effects.
I am a white bread I am but inside my fellow human and chewed in the mouth and breaks down my carbohydrates and then I become a boules then I am swallowed through the esophagus which pushes me to the stomach which then I digest into chyme and then the stomach secrets it’s juices to break down the protein then I’m pushed to the small intestine dejunume where liver secretes bile to gallbladder then gallbladder secretes it and stores it. Also the pancreas secretes also enzymes to break it down. Then intestine justices break me down then I am sucked up of my nutrients and put into cells and then my remains go to large intestine where water and minerals are absorbed and then I’m sent to the rectum then anus to land in a toilet water to take on a new journey. :) hope this helps so how
