Reading- my final exam help please !

Where do the respiratory and circulatory systems meet? a. in the heart b. in the muscles c. in the lungs d. in the brain

The picture represents a structure of the respiratory system. which is the function of this structure? to bring air into the body to exchange oxygen with carbon dioxide to carry air to the lungs to release oxygen from the body

This is a situation in which genes are attached to an organism's sex chromosomes; the sex of an organism influences the expression of a gene.