Estrogen triggers the liver to start converting lipids in the stored body fat to vitellogenin. As the vitellogenin is circulated through the bloodstream, the enlarging egg follicles absorb the vitellogenin, which is stored in the ova as yolk. When the eggs outgrow their ovarian container, they break through the ovary walls and spill into the abdominal cavity where they keep growing. The oviducts run alongside the inside wall of the abdominal cavity. Testes Male iguanas are fully equipped with two testes and the hemipenes , the bi-lobed copulatory organ.
Male iguanas have the largest testes for their body size of all reptiles.
Some keepers of sexually mature adult males don't doubt this for a second, given how their sweet Dr. Jekyll lizard becomes the raging Mr. Hyde once breeding season hits. The great apes, then, have one-fourth as much testicular tissue, relatively speaking, as do the green iguanas. Iguana keepers who have had occasion to clean up iguana ejaculate are not surprised by this datum. Germ cells are the cells that are stored in the testes and ovaries which, when triggered to start growing, become either the sperm or eggs. Follicles are the enlarging ova in ovaries, prior to fertilization.