Hello! Here are a couple of major events that happened in the Mesozoic Era.
1. The Mesozoic Era began with the largest mass extinction in history, killing off the vast majority of marine and terrestrial life on Earth.
2. After that mass extinction, the super continent Pangaea began to break off, and the dinosaurs began to flourish the Earth, although they were killed off at the end of the Mesozoic Era.
Answer: Pulmonary veins.
Explanation:
Pulmonary vein receives oxygen-rich blood from the lungs into the left atrium where it is pumped into the left ventricle, the aorta and then further distributed to the rest of body.
I believe it is the ascending loop of henle. In the ascending portion, the loop becomes impermeable to water and instead the cells of the loop, actively reabsorb the solute; thus water is not reabsorbed but ions are readily reabsorbed. As the ions are reabsorbed the concentration becomes more and more hypotonic until it reaches 100-150 mOsm/L. Therefore, the ascending loop is called the diluting segment of the nephron due to its ability to dilute the fluid in the loop from 1200 to 100 mOsm/L.
