and the Digestive System
Homeostasis and the Digestive System
Homeostasis refers to how a person under conflicting stresses and motivations can maintain a stable psychological condition. A good example is the law of supply and demand, whereby the interaction of supply and demand keeps market prices reasonably stable.Another meaning of Homeostasis is the human body uses a number of processes to control its temperature, keeping it close to an average value or norm of 98.6 degrees Fahrenheit.For example,A person with a high fever has hot, dry skin if they do sweat to help cool it. On the other hand, the body reduces heat-loss in cold surroundings by sweating less and reducing blood circulation to the skin.
The Digestive System
The digestive system is the series of tube like organs that convert our meals into body fuel. Along the way, food is broken down, sorted, and reprocessed before being circulated around the body to nourish and replace cells and supply energy to our muscles.Moistening saliva fed into the mouth from nearby glands starts the process of chemical digestion using specialized proteins called enzymes.Once we swallow, digestion becomes involuntary.The esophagus empties into the stomach, a large, muscular chamber that mixes food up with digestive juices including the enzymes pepsin, which targets proteins, and lipase, which works on fats. Hydroelectric acid likewise helps to dissolve the stomach contents while killing potentially harmful bacteria.The first of three sections of the small intestine, the duodenum produces large quantities of mucus to protect the intestinal lining from acid in the chyme. The small intestine is where the major digestion and absorption of nutrients take place.These nutrients are taken into the bloodstream, via millions of tiny, finger like projections called villi, and transported to the liver.What's left in the digestive tract passes into the large intestine, where it's eaten by billions of harmless bacteria and mixed with dead cells to form solid feces.
Other interesting Systems
Your Skeletal system is all of the bones in the body and the tissues such as tendons, ligaments and cartilage that connect them.The main job of the skeleton is to provide support for our body. Without your skeleton your body would collapse into a heap. Your skeleton also helps protect your internal organs and fragile body tissues. The brain, eyes, heart, lungs and spinal cord are all protected by your skeleton. Your cranium(skull) protects your brain and eyes, the ribs protect your heart and lungs and your vertebrate protect your spinal cord.Bones provide the structure for muscles to attach so that our bodies are able to move
The circulatory system is a vast network of organs and vessels that is responsible for the flow of blood, nutrients, hormones, oxygen and other gases to and from cells.Without the circulatory system, the body would not be able to fight disease or maintain a stable internal.The heart, blood, and blood vessels make up the cardiovascular component of the circulatory system. Cardiovascular disease is the leading cause of death in the United States. Because of its vastness and critical nature, it is one of the systems of the body most prone to disease.One of the most common diseases of the circulatory system is arteriosclerosis, in which the fatty deposits in the arteries causes the walls to stiffen and thicken the walls.
While most people associate muscles with strength, they do more than assist in lifting heavy objects. The 650 muscles in the body not only support movement — controlling walking, talking, sitting, standing, eating and other daily functions that people consciously perform — but also help to maintain posture and circulate blood and other substances throughout the body, among other functions.The muscular system can be broken down into three types of muscles: skeletal, smooth and cardiac, according to the NIH.Skeletal muscles are the only voluntary muscle tissue in the human body and control every action that a person consciously performs.Common primary muscle disorders include inflammatory myopathies, including polymyositis, which is characterized by inflammation and progressive weakening of the skeletal muscles; dermatologists, which is polymyositis accompanied by a skin rash; and inclusion body myositis, which is characterized by progressive muscle weakness and wasting.