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!

condensation. good luck!

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.