Which urinary structure serves as the transporter for urine toward the bladder?

The answer is ureter. They concentrate the urea from nephrons and collect in the bladder.  They are larger in diameter (25–30 cm) compared to the proximal and distal tubules, loop of henle and collecting tubules. There is one ureter for each kidney connecting to the bladder. The ureter has smooth muscles that cotract and direct the urine to the bladder

the answer is c) an oak tree

answer: - b cells

explanation: -

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.