However, lobotomies can also go very wrong. The brain is an extremely delicate and very complex organ, and in the era when lobotomies were performed, people did not know much about the brain, as they did not have the benefit of a wide range of scientific tools to visualize the brain and its activities.
Human bodies donât contain 10 times as many bacteria as human cells, new calculations suggest. A âstandard manâ weighing 70 kilograms has roughly the same number of bacteria and human cells in his body, researchers report online January 6 at bioRxiv.org. This average guy would be composed of about 40 trillion bacteria and 30 trillion human cells, calculate researchers at the Weizmann Institute of Science in Rehovot, Israel, and the Hospital for Sick Children in Toronto. Thatâs a ratio of 1.3 bacteria to every one human cell. That estimate could be off by as much as 25 percent, with the average number of bacteria ranging from 30 trillion to 50 trillion. Among individual people, the bacterial count could vary as much as 52 percent, say Ron Sender, Shai Fuchs and Ron Milo.
Students review the parts of their body. BACKGROUND: The human body is composed of organs that are part of different body systems that allow the human body to work. The design of the body will be explored as well as the different tissues that combine to make the different organs such as the heart and lungs.