Inside testes are these specialized tubules known as feminine philosopubials. And inside the seminar philosopubials is where the sperm cells are actually formed and the process by which the sperm cells are formed inside the seminar philosopubials of the testes is known as spermatogenesis. And this will be the focus of this lecture. So let's begin by taking a cross section of the male gonads artistes. We get the following diagram. Now, these brown convolute tubules are the seminiprilly's tubules.