INQUIRY LAB - CHICKEN EGG

Inquiry lab - chicken egg



Inquiry Lab - Chicken Egg

Introduction

The chicken egg comprises of the ovum, routinely called the yolk, and the accessory components, namely albumen, shell membranes and shell. The yolk or ovum is formed in the ovary and released into the abdominal cavity near the unfastening of the oviduct. The ovum is cleared by ciliary activity into the oviduct where fertilization may occur. The egg cell or ovum issued from the hen's ovary comprises of the yellow yolk mass in addition to a small area of yolk-free cytoplasm, the germinal computer disc, which is established on the exterior of the yolk. Because of large allowances of yolk, cleavage happens only in the germinal computer disc and the embryo grows by soaking up raw components for its metabolism from the yolk. (Roekel, 1952)

Results and discussion

During its passage down the oviduct, some accessory characteristics are supplemented to the ovum (note: the term "egg" is best booked for the shelled entity prepared by the hen, while the egg cell, that structure issued from the ovary, is called an "ovum"). In the first section of the oviduct, viscous stringy albumen is secreted and adheres to the ovum. As the ovum moves along, rotation rotates the stringy albumen into a two of strands which surround and task beyond the ovum. In the next oviduct region, more- watery albumen is added. Finally, two case membranes and a calcareous case are applied surrounding the entire structure. (Embryos, 1949)

Calculations

The birds and eggs used in this study were all derived from a single hatchery, designated Hatchery A in a previous publication (19). A total of 16 outbreaks of CRD in broiler chickens from this source were brought to our attention by the growers. The original breeder flock was visited first in 1952 in ...