The main function of the part labeled III is
-
formation of egg shell
- secretion of digestive enzymes
- implantation of foetus
- temporary storage of food
The correct answer is: A
Explanation
The part labeled (III) is the uterus, it serves the following functions during egg formation in poultry birds:
1. The uterus is responsible for depositing the egg white around the yolk as it passes through. This provides protection and nutrition to the developing embryo.
2. The inner and outer shell membranes are formed in the uterus, providing additional protection for the egg.
3. The uterus is where the eggshell is formed. The shell is primarily composed of calcium carbonate, which is deposited in layers around the egg. This provides structural integrity and protects the contents of the egg.
4. The uterus serves as a temporary storage site for the egg before it is laid.