Use the list of word here and in your Lab Manual to match the word with its definition Allantois Amnion Amniote egg Avidin Blastodisc Calcite Chalaza Chorion Cuticular membrane Macrolecithal egg Mammillary layer Ovalbumin Ovomucin Ovotransferrin Shell membranes Spongy layer Vitelline envelope Yolk sac 31. The type of egg typical of the amniotes, and an egg that can survive on land. It consists of a hard outer shell that protects the embryo from physical damage and dehydration, and a large yolk along with a watery albumen that provide the nutrients and water necessary until hatching. The embryo develops four extraembryonic membranes, the chorion, amnion, yolk sac, and allantoic membranes. 32. An extracellular coat surrounding an ovum. 33. An egg with a large quantity of yolk, as in the chick, fish, and insect eggs. 34. Calcium carbonate (CaCO3). One of the commonest minerals and is found in a variety of crystalline forms. It is the form of calcium found in the eggshell of a bird 35. The inner calcified layer of the chick eggshell, lying next to the outer spongy layer. The crystals of calcium carbonate lie perpendicular to the surface of the egg, giving the shell tremendous strength. 36. The outermost shiny membrane of a chick eggshell. It is made of glycoprotein that, prior to laying, is wet and slippery, thereby helping with egg laying. Soon after laying, it dries out and serves to protect against invasion by microorganisms 37. Also called crystalline layer. The outer calcified layer of the chick eggshell, lying next to the inner mammillary layer. The crystals of calcium carbonate lie perpendicular to the surface of the egg, giving the shell tremendous strength. 38. The most abundant glycoprotein found in the albumen of a chick egg. 39. An enzyme that inhibits bacterial growth by binding iron, making it unavailable to the bacteria. it can be found in the albumen of a chick egg. 40. An enzyme that inhibits bacterial growth by binding the vitamin biotin, making it unavailable to the bacteria. It can be found in the albumen of a chick egg. 41. A protein that is thought to have antiviral activity. It can be found in the albumen of a chick egg 42. In a chick egg, the portion of albumen that is very dense and coiled into two cordlike structures that attach tightly to the yolk membrane. They suspend the yolk in the middle of the egg and allow it to rotate. 43. In a chick egg, the puddle of non-yolky cytoplasm that sits atop the vast quantity of yolk. The nucleus of the egg sits in this area, and it is here that development begins. 44. The extraembryonic membrane found in amniotes that surrounds the embryo. It contains amniotic fluid, which protects the embryo by providing an isotonic fluid and buffering the embryo against being jarred. It forms from the somatopleure, a layer made up of epidermal ectoderm and somatic lateral plate mesoderm. 45. The extraembryonic membrane found in amniotes that lies outside of the amnion. It protects the embryo, and, in the chick will eventually fuse with the allantoic membrane. It forms from the somatopleure, a layer made up of epidermal ectoderm and somatic lateral plate mesoderm. 46. The extraembryonic membrane found in amniotes that forms off the hindgut of the embryo. It stores nitrogenous waste and in the chick will eventually fuse with the chorion to form the chorioallantoic membrane. It is vascularized and is formed from the splanchnopleure, a layer made up of endoderm and splanchnic lateral plate mesoderm 47. The extraembryonic membrane that surrounds the yolk. In the amniote, it is vascularized so that it can bring yolk nutrients from the yolk back to the embryo proper. It forms from the splanchnopleure, a layer made up of endoderm and splanchnic lateral plate mesoderm. 48. Membranes on the inner aspect of the calcareous portion of an eggshell. In the chick egg, there are two of these. These protect against desiccation and invasion by microorganisms
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