Infectious diseases are caused by microorganisms such as viruses, bacteria, fungi or parasites and can spread between individuals. 1  Infectious diseases are caused by microorganisms such as viruses, bacteria, fungi or parasites. 2  Microorganisms that cause disease are collectively called pathogens.
The Abdominopelvic Cavity The abdominopelvic cavity extends from the diaphragm to the pelvis. It is subdivided into a superior abdominal cavity and an inferior pelvic cavity (Figure 1-11a,c). The abdominopelvic cavity contains the peritoneal cavity, a chamber lined by a serous membrane known as the peritoneum.
This is because, while the abdominopelvic cavity includes both the abdominal and the (true/lesser) pelvic cavities, the structures mentioned are entirely in the pelvic cavity. The exceptions are the full bladder and the pregnant uterus, both of which will expand to enter the abdominal cavity. Edit: I was adding detail simply for the purpose of accuracy. I didn't launch any personal attack on other answers. Yet you decided to do just that. And this is the level of detail even a first year medical student would be expected to know. And finally, the human body has more than two cavities; Thoracic, abdominal, pelvic, cranial and vertebral. Double Edit: If you don't think the cranial cavity is a major cavity...