Homeostasis

And the Digestive system

Digestive system

The digestive system is a group of organs working together to convert food into energy and basic nutrients to feed the entire body. The digestive system begins in the mouth, Inside the mouth are many accessory organs that help in the digestion of food— the tongue, teeth, and salivary glands. The esophagus is muscular tube connecting to the stomach. The esophagus carries swallowed masses of chewed food along its length. Food then goes to the stomach. A stomach is a muscular sac that is located on the left side of the abdominal cavity. The small intestine's folds are used to maximize the digestion of food and absorption of nutrients. The livers main function is the production of bile and its secretion into the small intestine. The gallbladder is used to store and recycle excess bile from the small intestine. The pancreas secretes digestive enzymes into the small intestine to complete the chemical digestion of foods. The large intestine absorbs water and contains many symbiotic bacteria that aid in the breaking down of wastes to extract some small amounts of nutrients. Feces in the large intestine exit the body through the anal canal.

Homeostatis

Homeostasis is the control of body temperature of humans In humans, normal body temperature fluctuates around the value of 37 °C (98.6 °F). The stability, or balance, that is attained is called a dynamic equilibrium; that is, as changes occur, the body works to maintain relatively uniform conditions.Homeostasis is achieved by making sure the temperature, pH (acidity), and oxygen levels (and many other factors) are set just right for your cells to survive.

Facts

  1. The liver has over 500 different functions, one of which is producing bile to break down digestive fats
  2. The stomach of an adult holds up to 1.5 liters of food and food stays here for 2 to 3 hours
  3. Muscles contract and relax in the esophagus to push food down to the stomach — it works even when you’re upside down!
Big image
Big image

Junk food

Food is fuel for your body. It has a direct impact on how you feel as well as on your overall health. Fast food isn’t necessarily bad, but in many cases it’s highly processed and contains large amounts of carbohydrates, added sugar, unhealthy fats, and salt (sodium).

These foods are often high in calories yet offer little or no nutritional value. When fast food frequently replaces nutritious foods in your diet, it can lead to poor nutrition, poor health, and weight gain. Testing lab animals have even shown a negative effect in short duration diets. Being overweight is a risk factor for a variety of chronic health problems including heart disease, diabetes, and stroke.