Question

Mesorchium is peritoneal covering of
A. Ovary
B. Testis
C. Kidney
D. Liver

Answer 1

Peritoneal covering can be defined as a layer which forms the lining of the abdominal and pelvic cavities and also most of the abdominal viscera. It is a very thin membrane and is composed of a layer of mesothelium.

Complete Answer:
- Though the ovary is suspended into the peritoneal cavity, the surface of the ovary is not covered by the peritoneal layer.
- Mesorchium is basically a fold of fibrous sheath of tunica vaginalis which is nothing but the outer covering of the testis. Mesorchium attaches the vascular and avascular structures of the spermatic cord together.
- Kidneys are an example of retroperitoneal organs, which means they are covered by the peritoneum only on the anterior side. They are covered by peritoneum and not mesorchium.
- The liver is covered by peritoneum on the posteroinferior surface and not mesorchium. The liver is made up of cells called hepatocytes which are identical and perform the majority of the function of the liver.

Thus, the correct option is B) Testis.

Note: Do not get confused between the terms mesorchium and mesovarium. These two terms are entirely different as,
- Mesorchium: It is found as a layer in testes and helps in attaching vascular and avascular structures of spermatic cord.
- Mesovarium: It is a broad ligament of the uterus which suspends the uterus and does not cover the ovaries. Ovaries are covered by germinal epithelium instead.