Structure Of An Avian Egg

Question 1

Functions of the shell

Answer 1

It stops unwanted toxins entering the shell. It is made from a calcium carbonate to protect the developing chick and it is semi-permeable which allows for gas exchange

Question 2

Functions of the yolk

Answer 2

It provides food and nutrition as the egg forms

Question 3

Functions of the albumen

Answer 3

It contains a variety of proteins

Question 4

Functions of the air cell

Answer 4

This is a gap located between shell membranes

Question 5

Functions of the chalazza

Answer 5

It holds the yolk and the egg white. Two spiral strands

Question 6

Functions of the inner and outer shell membrane

Answer 6

Effective defence from invading bacteria. Made from proteins which lie between the egg shell and the albumen

Question 7

What are the 4 extra embryonic membranes

Answer 7

Chorion, amnion, allantois, yolk sac

Question 8

Function of the chorion

Answer 8

Surrounds the embryo and allows for gas exchange

Question 9

Function of the amnion

Answer 9

Forms a sac which helps protect the embryo and help hold back the amniotic fluid which acts as a shock absorber

Question 10

Functions of the allantois

Answer 10

Develops large circulatory system which allows for respiration and excretory, digestive functikns

Question 11

Functions of the yolk sac

Answer 11

Digestive functions as is used as a food source for the embryo