Blood flows to the kidneys through the right and left renal arteries. Inside each kidney these branch into smaller arterioles.
The blood is at very high pressure and flows through the arterioles into tiny knot of vessels called the Glomerulus. These are located in the nephrons.
From the glomerulus the blood pressure drops and the blood flows into arterioles which coil around the nephrons. These in turn connect to a series of small veins. These vessels reunite and ultimately form the renal vein.
About one quarter of the total cardiac output (or total blood flow) circulates through the kidneys. This equates to just over 1 litre of blood every minute.
Hope this helps (:
- - <span>B. Lamarck is the best to explain this as he studied human physiology. </span>
Complete question:
In the attached files
Answer:
- Increasing uncontrolled poaching acts as some kind of <em>"selective pressure"</em>.
- Animals that carry the genes to grow tusks are removed from the population, and most of the surviving animals are those that do not have tusk and that carry the gene for tusklessness.
- Tuskless animals get to reproduce more frequently, transmitting the tusklessness gene to their progeny, and hence, increasing its frequency in the population.
Explanation:
Due to technical problems, you will find the complete question, the answer, and the explanation in the attached files.
1 you run out of fuel 2 it takes a long time 3 it’s hard to get back 4 the conditions are constantly changing making it harder to predict what could happen. Look at Apollo 12 as a example
Animal action is physical weathering
