In 2016, the Louvre was the world's most visited art museum, receiving 7.3 million visitors. The museum is housed in the Louvre Palace, originally built as a fortress in the late 12th to 13th century under Philip II. Remnants of the fortress are visible in the basement of the museum.
The primary sex organ of a male is the testis. The testis is the reproductive gland of males. It produces spermatozoa and the androgens.
Prostate Gland. The prostate gland is an essential part of the male reproductive system. The prostate gland, as it is commonly called, is not really a gland at all, but an organ that consists of about 70 percent glandular tissue and 30 percent fibromuscular tissue. In an adult male, it is about the size and shape of a walnut and weighs about 20 grams.