Homeostasis
And the digestive system
Facts about homeostasis and the digestive system
"The concept of homeostasis is widely used, in physiology and psychology, to identify what seems to be a general attribute of living organisms: the tendency to maintain and restore certain steady states or conditions of the organism. An obvious example is that of body temperature, which in the human tends to fluctuate only in a narrow range about the value 98.6° F. When the temperature rises above the normal range, corrective reflexes (perspiration, reduced metabolism, etc.) go into action to restore the steady state. Persistent deviation may initiate other actions (moving into the shade, plunging into water, etc.). If body temperature drops, other corrective actions are observed.Many bodily steady states follow this pattern. Blood glucose level, blood pH, and osmotic pressure are examples. The key concepts are: an observable steady state that persists over time with minor changes; thresholds above and below this normal range; a sensory input that reports changes in the steady state; and effector mechanisms for restoring the steady state."
* I got this information from Encyclopedia.com.*
Muscular system
The muscular system is responsible for the movement in the body. There are 700 muscles that take up half of the body's weight. Muscles help you walk, talk, sit, stand, eat, and many other things. The muscular system also helps the digestive system because the muscles around the stomach help the food move from your stomach to your small intestine. Another reason why the muscular system helps digestive system is because the muscles help you chew and swallow. Muscles also surround the esophagus, stomach, small intestine, and large intestine. If we didn't have the muscular system, we wouldn't be able to move, eat, or do anything at all!
Cardiovasc-ular system
The cardiovascular system is made up of the heart, blood, and blood vessels. The cardiovascular system circulates blood through a network of vessels in body, to provide each cell with oxygen and nutrients, and helps dispose waste. The cardiovascular system also regulates the body temperature, and protects the body. This system also maintains the fluid balance in your body. But the cardiovascular system doesn't just work by itself, it also helps the respiratory system. The cardiovascular system and the respiratory system both help deliver oxygen to the tissues in your body, and removes carbon dioxide. As you can see, if we didn't have the cardiovascular system, our bodies would be chaos!
Skeletal system
The skeletal system contains 206 bones in the body. But the skeletal system doesn't just contain bones, it also has tendons, ligaments, and cartilage.The skeletal system is known as the "framework" of the body. The skeletal system's functions are support, movement, and calcium storage. These functions help us survive. This system also has mechanical protection for all of the organs in the body. If we didn't have the skeletal system, we wouldn't even be able to move!
The Foods We Eat!
"Every day, nearly one-third of U.S. children aged 4 to 19 eat fast food, which likely packs on about six extra pounds per child per year and increases the risk of obesity, a study of 6,212 youngsters found. The numbers, though alarming, are not surprising since billions of dollars are spent each year on fast-food advertising directed at kids, said lead author Dr. David Ludwig, director of the obesity program at Children's Hospital Boston.
The findings suggest that fast-food consumption has increased fivefold among children since 1970, Ludwig said.
The nationally representative study included boys and girls from all regions of the country and different socio-economic levels.Fast-food lovers consumed more fats, sugars and carbohydrates and fewer fruits and non-starchy vegetables than youngsters who didn't eat fast food. They also consumed 187 more daily calories, which likely adds up to about six pounds more per year, the study found."
The findings suggest that fast-food consumption has increased fivefold among children since 1970, Ludwig said.
The nationally representative study included boys and girls from all regions of the country and different socio-economic levels.Fast-food lovers consumed more fats, sugars and carbohydrates and fewer fruits and non-starchy vegetables than youngsters who didn't eat fast food. They also consumed 187 more daily calories, which likely adds up to about six pounds more per year, the study found."
* I got this information from cbsnews.com*