The important structure of the urinary system is:
The kidneys, ureters, bladder, and urethra are the primary structures of the urinary system. they filter blood and remove waste from the body in the form of urine. The size and position of lower urinary structures vary with male and female anatomy.
Hope this helped
The term yardstick refers to what is a normal response. It really has nothing to do with a yardstick and can be used in many situations. A yardstick is a measurement that has been tested over and over and than that measurement becomes the standard.
Say the yardstick for a reaction time is 5 seconds
Meaning that is what a normal healthy person can do it in.
Joan has the reaction in 4.8 second. Well she is on the the bell curve and did better than the yardstick test measure.
Well, 1,300 people die from tobacco smoking in a day. But it's 1 out of 5 deaths.
Cilia is found in the trachea, they keep mucous and dirt etc out of the lungs
It changed because now lots of people look at it as being "gross"
