Functions Of The Human Body

tates that human body is a complex system and is made up of trillions of cell. According to____, the human body consists of one hundred trillion cells. Cell is the basic functional unit of life where the metabolic reaction occurs that are vital for survival and keeps us alive (). The human body is made up of many body systems that are vital for survival and functioning of the body. According to______,all together the human body is made up of eleven body systems. They include nervous system, cardiovascular system, immune system, respiratory system, nervous system, musco-skeletal system, urinary system, lymphatic system and endocrine system. Each of the body systems play an important role in the functioning of the body. For example: digestive system helps to digest foods consumed by converting them into smaller molecules of nutrients needed by the body for growth and cellular repair. In the process of digestion, glucose is formed which is the vital source of energy for our body to carry activities physically and on cellular level. Similarly, the immune system protects the body when it is infected from pathogens and viruses.

As human being, oxygen is vital for our survival and to carry out our bodily biological functions such as producing energy also known as cellular respiration. …show more content…
During the process of diffusion, the oxygen from the alveoli sacs is picked up by the red blood cells in the blood of capillaries. It is because of the oxygen concentration being higher in the alveoli sacs and lower in the capillaries. Similarly, the carbon dioxide from the blood in the capillaries is transported into the alveoli cells because of the carbon dioxide concentration being higher in the blood and less in the alveoli cell. From the alveoli sacs, carbon dioxide is exhaled out of the body when the diaphragm relaxes allowing the lungs to