The countercurrent heat exchanger that prevents arterial blood from overheating the testes is the pampiniform plexus of veins. The pampiniform plexus helps to regulate testicular temperature, allowing sperm maturation. It surrounds the testicular arteries and works as a countercurrent heat-exchanger system to cool the arterial blood before entering the testes. This is because the sperms can not develop if the testis is at body temperature.
It specifies what exactly the variations are of whatever population is being examined.
Answer:
Even though they might have a common ancestor there might be a closer common ancestor to the original ancestors than the organism you're looking at.
I hope this helps
Explanation:
This question is asking for the number of ATP that is produced by the citric acid cycle and the electron transport chain.
Citrate is the first biological substance in the citric acid cycle and it is the starting point of the cycle. From one molecule of citrate, the citric acid cycle will produce 2 ATP while the electron transport chain will produce 34 ATP. Therefore, together both the citric acid cycle and the electron transport chain will produce 36 ATP.
