three
There are 500 white blood cells to every 1000 red blood cells (or you could say there is double the amount of red blood cells). The answer would be 200 red blood cells for every 100 white blood cells.
1
I think none, because Epidermis cells are on leaves.
40 to 50
Roughly about 2.4 million erythrocytes (red blood cells) are produced every second.
Three million red blood cells die and are reproduced every second. The dead red blood cells get degraded by the liver
The human body will compensate for the amount of red blood cells that die every day by producing around the same amount that was lost. Typically, 1% of the total amount of red blood cells die everyday. Therefore, 1% of the body's total red blood cell count will be produced every day.
Approximately 250 milliliters of oxygen is transported to the cells every minute by red blood cells. This oxygen is carried by hemoglobin in the blood and delivered to tissues throughout the body for cellular respiration.
There are countless factors that determine the amount of blood cells in anyone, child or adult. There are billions and billions within every human, and the numbers are constantly changing as you lose blood and produce new blood cells to replace the dead ones. As a matter of fact, by the time you are done reading this answer, your body will have likely produced thousands if not millions of new blood cells via mitosis!
The average human body has about 7,000 white blood cells per microliter of blood. The average adult human has about 5.25 liters of blood, or 5,250,000 microliters. Multiplying these two numbers gives a total of almost 37 billion white blood cells. Note that this is simply an average.
3 million
There are about a thousand times as many red blood cells as white cells. Consider that the red blood cells (or erythrocytes) in a mm3 (or microliter) of blood number about five million in an average man (a few less in a woman). The white blood cells (or leukocytes) number only 5-6 thousand per mm3 so the ratio is about a thousand fold.