Bone cells concentric circles around longitudinal tubes are called osteons.
Answer:
The correct answer is true.
Explanation:
Swallowing of food is the process of passing the food from the mouth to the stomach through the way of the throat (pharynx) and esophagus. This process takes place in three stages: oral, pharyngeal, and esophageal stages
During the pharyngeal stage, epiglottis which is a leaf-shaped flap of cartilage located at top of the larynx (a muscular organ forming voice box) perform functions in response to the swallowed food as the larynx lift up or rises inside the neck to close the epiglottis while the epiglottis moves downward to cover it, providing more airway protection.
Thus, true is the correct answer.
Carbon dioxide goes into the atmosphere and is absorbed by plants along with water, to produce oxygen an plant structures, whether cellulose, starch, or sugar-which are then eaten by mammals.
Stresses on the Earth's system include incomplete combustion of carbon to produce carbon monoxide. The burning of fossil fuels such as oil and carbon, And also the presence of excess ozone in the upper atmosphere.
Well your and my stomach is made up of a stomach lining, protecting the rest of the internal organs from the acid. This diagram might help you understand how the cells and how your stomach forms HCL. <span>HCL breaks down proteins in your </span>stomach<span> to prepare them for digestion (like the proteins in milk and meat) and kills bacteria that enter your </span>stomach. It converts the inactive enzyme <span>pepsinogen </span>into the active enzyme pepsin. If you need more information please feel free to ask!
