mature ovum造句

• The picture depicts a secondary oocyte becoming a mature ovum after meiosis.
• This process does not produce mature ovum until puberty.
• This results in a mature ovum.
• Another study in southwestern Mississippi found that clutch sizes ranged between 139 and 459 ova in females; average mature ovum diameter was; ovaries in mature females constituted 5.8-19.1 % of the somatic body weight.
• In contrast with males, each of the original diploid germ cells or primary oocytes will form only one mature ovum, and three polar bodies which are not capable of fertilization It has long been understood that in females, unlike males, all of the primary oocytes ever found in a female will be created prior to birth, and that the final stages of ova production will then not resume until puberty.
• In cockroaches, for example, vitellogenesis can be stimulated by injection of juvenile hormone into immature females and mature males . Chemically yolk is lipoprotein composed of proteins, phospholipids and neutral fats along with a small amount of glycogen . The yolk is synthesised in the liver of the female parent in soluble form . Through circulation it is transported to the follicle cells that surround the maturing ovum, and is deposited in the form of yolk platelets and granules in the ooplasm . The mitochondria and Golgi complex are said to bring about the conversion of the soluble form of yolk into insoluble granules or platelets.