I am system 'X'. I have ducts. My secretions act at the site of secretion. I have a counter system which is 'Y' and it has the opposite set of properties. Identify me and my counter system.

I am system 'X'. I have ducts. My secretions act at the site of secret

1.	I am system 'X'. I have ducts. My secretions act at the site of secretion. I have a counter system which is 'Y' and it has the opposite set of properties. Identify me and my counter system.
Answer» I am system 'X'. I have ducts. My secretions act at the site of secretion. I have a counter system which is 'Y' and it has the opposite set of properties. Identify me and my counter system.