Each pleural cavity is lined by a pleural membrane that is composed of two layers. The visceral pleura surrounds the outside of the lung. The parietal pleura lines the inside of the chest wall and extends over the diaphragm.
Again, it's an average, but the average date costs just less than $45. This is across the board, though; predictably, when broken down by gender, men spent a lot more than women per date. Women spent an average of about $34.29 per date, while men spent an average of about $65.69, they reported. There were also the penny-pinchers â about 20 percent said they spent an average of zero dollars per date, and a whopping 19 people, or almost 2 percent, said they spent more than $500 per date before marriage.
This is two more than the national 'official' figure. The average number of sexual partners in the 'average' woman's lifetime is eight, according to Natsal in The Lancet. The average for men is 12 partners. An average tells us nothing in this instance-researchers lump in Aunt Betty who hasn't had sex for 50 years with Becky, an 18-year-old, eagerly exploring sex for the first time, average out all the results and then call her the 'average woman'.