The phrase "male testes" refers to the reproductive organs found in males, also known as the testicles. They are responsible for producing sperm and hormones that are important for reproductive and sexual development in males. Full definition
As it turns out, the highest density of VGCCs are found in your nervous system, the pacemaker in your heart and in male testes. (articles.mercola.com)
Because male testes harbor spermatogonia throughout life, Yoshizaki says the finding means that a single male — or even just his testes, which researchers are now trying to preserve cryogenically — and a single female could repopulate a threatened fish species, without using mature sperm. (sciencemag.org)
Reich and lab members, Swapan Mallick and Nick Patterson, teamed up with previous laboratory member Sriram Sankararaman, now an Assistant Professor of computer science at the University of California, Los Angeles, on the project, which found evidence that both Denisovan and Neanderthal ancestry has been lost from the X chromosome, as well as genes expressed in the male testes. (sciencedaily.com)