Which of the following relationships is incorrect? a. visceral peritoneum/outer surface of small intestine b. parietal pericardium/outer surface of heart c. parietal pleura/wall of thoracic cavity

Video transcript

Welcome to the next question. It says, which one of the following is the largest body cavity in the human body. A dorsal body cavity. B ventral body cavity, C pericardial cavity or D spinal cavity. Well, we can eliminate two pretty easily right away. The pericardial cavity would be inside the heart. So that is obviously not going to be the largest cavity in the body. And choice D to spinal cavity is that space within the spinal column, the vertebral column. And again, that's obviously not going to be the largest. So we just have to keep straight the dorsal and ventral body cavity. Well, the dorsal body cavity is going to be, there's less space there. Imagine the spinal column going down in the back. There's just not a lot of space around it as opposed to the ventral body cavity, which has all these organs in it. So that will lead us to choice b the ventral body cavity, which is indeed the largest body cavity. It's divided into the thoracic and abd domino pelvic cavities. So that would include the heart and lungs up in the thoracic cavity and the digestive reproductive and urinary organs in the abdominal pelvic cavity. So that's pretty clear if you think about it to be that largest cavity, the dorsal body cavity is not correct. That also is subdivided into two cavities. But that would be the cranial cavity and the spinal cavity. And again, if you think about the size of those areas, as it compared to this entire thoracic and abdominal pelvic area, that's clearly smaller. So that's why choice A is not correct. So again, the largest body cavity in the human body, choice B the ventral body cavity. See you in the next video.