NERVOUS SYSTEM

HUMAN NERVOUS SYSTEM

 
There are two parts of our nervous system, the central nervous system, which includes the brain, spinal cord, and the peripheral nervous system. It consists of neurons found all over the body. The brain helps to regulate and run all the other systems of  human body.  The brain sends signals to the spinal cord and through the body's nerves to all the other organs. There are different parts of the brain which specialize in processing thoughts, memories, feelings, dreams, speech, physical coordination, balance, hunger, and sleep. Our nervous system is extremely complicated and helps the other systems in our body to communicate. Our nervous system is active at every moment of the day. It exchanges millions of signals corresponding with feeling and actions.

RESPIRATORY SYSTEM OF HUMAN BODY.

Respiratory system is a important system of human body. The respiratory system supplies our body with oxygen. Air that enters the nose and moves down the trachea and into large bronchial tubes that are connected to each lobe, of the lungs. The tubes branch into many smaller tubes that end in many tiny passageways called “alveoli”. In these teeny spaces, oxygen gas enters the bloodstream and carbon dioxide gas is removed. This carbon dioxide gas is sent back up the trachea and breathed out through the nose.

oxygen works in every cell of our body. Each and every cell in the body needs oxygen so they can reproduce, move, build and turn food into energy.

Normally we take about 20 breaths each minute. When we breathe air, it goes in through your nose and mouth and into your lungs. You're able to pull in the air by flexing your diaphragm, and when you exhale it relaxes to push the air back out. Our lungs expand as we breathe in, then contract as we breathe out.

Digestive system of Human body.

Digestive system starts from mouth to anus. different parts of the system are Oral Cavity, Esophagus, Stomatch, Large instestine, Small intestine, Rectum etc. When we enter some food in our mouth, our teeth help to cut and grind that food. This food is thrown in pharynx and then travel through Esophagus and reaches to Esophageal Sphincter and finally this food reaches in Stomach. Crossing Duodenum this food reaches in intestine. The colon absorbs H2o, produces vitamins, produces mucous and forms & exples feces. liver and pancreas also helps in digestive system. Finally the wastage goes outside thorugh rectum.