21. Their gametes are produced in the coelomic lining, where they are released into the coelom to mature. 22. Mammalian embryos develop two cavities : the intraembryonic coelom and the extraembryonic coelom ( or chorionic cavity ). 23. Mammalian embryos develop two cavities : the intraembryonic coelom and the extraembryonic coelom ( or chorionic cavity ). 24. The space between the parietal layer and the visceral layer is known as the coelom or body cavity. 25. The males are white at this time and the females yellowish due to the oocytes in their coelom . 26. In almost every segment is a pair of excretory organs called nephridia, which are derived from coelom tissue. 27. Early in embryonic life visceral organs develop adjacent to a cavity and invaginate into the bag-like coelom . 28. The term refers to the order of organization of cells in the gastrula leading to development of the coelom . 29. Nephrotomes are not related to nephrostomes, which are thin ciliated funnels that link pronephric nephrons to the coelom . 30. The term " Coelomate " means having a body cavity ( coelom ) containing the internal organs.
