As a paramedic/fire fighter, BPM means Beats Per Minute , you can simply feel your heart beat by pressing a finger on the chin, specifically between neck and chin., or you can do it by the wrist/arm aswell.
We measure heart rate by listening to the heart, overall.
Answer:
Explanation:
There are an estimated 200 million microvilli per square millimeter of small intestine, greatly expanding the surface area of the plasma membrane and thus greatly enhancing absorption.
Will, some of them will died because they will not be able to to adapt to the cold. Some might even survive, and adapt to that new climate, this is called natural selection.
A physician who specializes in treatment of the gums is called a periodontist.
Answer:
2%
Explanation:
The scientist believe that around 2% of the species that existed on Earth have been preserved in the fossil records. It is still a hot debate about it though, as there are only around 250,000 species identified in the fossil records so far, which is less than a quarter from the species that live in the present.
The reason why scientists believe that the majority of the species have not been preserved are very logical though. One of the reasons is that lot of species existed very long time ago, so their remains just didn't lasted so long. Other reason is the movement of the plates, where we have situation where plates that existed in the past have been totally suducted and melted in the mantle, while others are at the verge of it, so every fossil with them is melted and destroyed too. Another reason is that lot of species do not have hard parts, solid bone structure, so their preservation has been pretty much impossible,
