What is the function of the structure labeled Y?
A. to keep orygen-rich blood and oxygen-poor blood flowing

B. to filter waste materials from oxygen-poor blood

C. to fiter waste materials from oxygen-rich blood

D. to keep orygen-rich blood and oxygen-poor blood
separate

Hey there!

I'm assuming it's pointing to the wall in between the two sections of the heart.

We can go over the function of the blue section and red section of the heart. Though I must admit I am not well versed with hearts of birds, I will assume this is similar to a human one. The blue section receives blood from the body which doesn't have any oxygen left in it, and the red section receives blood from the lungs, newly oxygenated. This sector in between separates these two sections, and separates oxygen-poor blood and oxygen-rich blood.

Thus, your answer is option D.

Hope this helps, feel free to let me know if you have any additional questions about this specific problem!

carbohydrates: (starches and sugars) composed of carbon, hydrogen, and oxygen.

lipids: (fats, oils, and waxes) are made of carbon and hydrogen atoms.

nucleic acids: contain hydrogen, oxygen, nitrogen, carbon, and phosphorus. they are polymers of nucleotides. a nucleotide has three parts, a 5-carbon sugar, a phosphate     (-po⬇️4) group, and a nitrogenous base.

proteins: made up of nitrogen, carbon, hydrogen, and oxygen. they are polymers of amino acids.

the titanic would be the correct answer