By he NIH trying a new drug to help reduce pain associated with sickle-cell anemia, it's an example of an "experiment".
An experiment involves a hypothesis (an educated guess as to what's going to happen) and trying out the hypothesis and finding the solution.
22: 90
23: 13
24: (too blurry for me to read, I am so sorry!)
25: 3
26: (too blurry for me to read, I am so sorry!)
27: 3
28: 30
Not much explanation, just knowing how to read labels and where to look!
Hope this helps, have a nice day! :D
The answer is true. The kidneys help filter and remove extra waste and extra water that turns into urine. The urine flows from the kidneys to the bladder through tubes called ureters. The bladder stores the urine until urination occurs.
