【概 要】
・「臓側腹膜と壁側腹膜の間にはわずかな空隙があり、この空隙を腹膜腔という。」（日本人体解剖学）
例えて言うと、ビニール袋の入った段ボール箱があったとする。そのとき、腹腔は段ボール箱全体を指し、腹膜腔はそれぞれのビニール箱の中の狭い空間を指す。
【参考になるサイト】
以下はWikipediaの解説文となる。
The peritoneal cavity is a potential space located between the two layers of the peritoneum—the parietal peritoneum, the serous membrane that lines the abdominal wall, and visceral peritoneum, which surrounds the internal organs. While situated within the abdominal cavity, the term peritoneal cavity specifically refers to the potential space enclosed by these peritoneal membranes. The cavity contains a thin layer of lubricating serous fluid that enables the organs to move smoothly against each other, facilitating the movement and expansion of internal organs during digestion.
まとめ：腹膜腔とは壁側腹膜と臓側腹膜との間の潜在腔のことで漿液を含み内臓間動きを滑らかにしている。
【 語 句 】
・potential space：潜在腔 ・：・： ・peritoneum：腹膜 ・the parietal peritoneum：壁側腹膜 ・serous membrane：漿膜 ・visceral peritoneum：臓側腹膜 ・lubricating：潤滑させる ・serous fluid：漿液 ・facilitating：促進させる ・digestion：消化
The parietal and visceral peritonea are named according to their location and function. The peritoneal cavity, derived from the coelomic cavity in the embryo, is one of several body cavities, including the pleural cavities surrounding the lungs and the pericardial cavity around the heart.
【 語 句 】
・peritonea：腹膜、peritoneumの複数形 ・coelomic cavity：体腔 ・embryo：胚 ・pleural cavities：胸膜腔 ・pericardial cavity：心膜腔
The peritoneal cavity is the largest serosal sac and fluid-filled cavity in the body, it secretes approximately 50 milliliters (1.7 U.S. fl oz) of fluid daily. This fluid serves as a lubricant and has anti-inflammatory properties. The cavity is divided into the greater and lesser sacs, with the greater sac further subdivided into the supracolic and infracolic compartments.
【 語 句 】
・secrete：分泌する ・approximately：おおよそ ・anti-inflammatory：抗炎症 ・supracolic：結腸上部
【Compartments】
The peritoneal cavity is divided into the greater and lesser sacs. The greater sac comprises the majority of the peritoneal cavity, while the lesser sac, also known as the omental bursa, is smaller and situated posterior to the stomach and lesser omentum. They are connected by the omental foramen.
The greater sac is further subdivided into two compartments by the mesentery of the transverse colon, known as the transverse mesocolon. This division creates an upper and a lower compartment within the greater sac, named the supracolic and infracolic compartment respectively, each housing different organs and structures of the abdominal cavity.
The liver, spleen, stomach, and lesser omentum are contained within the supracolic compartment. The small intestine surrounded by the ascending, transverse, and descending colon, and the paracolic gutters are contained within the infracolic compartment.
【 語 句 】
・comprise：～からなる ・omental bursa：網嚢 ・lesser omentum：小網 ・omental foramen：網嚢孔 ・mesentery： ・transverse colon ： ・transverse mesocolon： ・： ・： ・： ・： ・： ・： ・： ・： ・： ・： ・： ・： ・： ・： ・： ・： ・： ・： ・： ・： ・： ・： ・： ・：
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