Four bones of the skull contain paired air spaces called the paranasal sinuses that help to lighten the heavy load of the head.
<h3>What is Paranasal Sinus?</h3>
The paranasal sinuses are air-filled, bony spaces located next to the nasal passages in the face bones of the skull. They grow via slowly expanding pneumatized cells that erupt from the nasal cavity. The term is typically used in everyday speech to refer to the hollow, air-filled spaces in front of the human skull. There are four pairs of sinuses in humans. There are now eight sinuses in all. These four pairs of sinuses are together referred to as paranasal sinuses since they are all joined to the nasal cavity.
To know more about Sinus with the help of the given link:
brainly.com/question/8321398
#SPJ4
The concentration expressed in parts per million is 782 ppm.
<h3>What is Parts per million?</h3>
It is calculated by dividing the mass of the solution by the mass of a solute present in one million (10⁶) parts.
<h3>Calculation for units in ppm:</h3>
Given:
Mass of blood alcohol = 80 mg/dL = 80 x
g/mL
Density of blood plasma or Mass of blood plasma = 1.023 g/mL
Concentration in ppm = (Mass of alcohol/Mass of plasma) x 
= (80 x
g/mL/ 1.023 g/mL) x 
= 782 ppm
Hence, the concentration expressed in parts per million is 782 ppm.
Learn more about concentration here:
brainly.com/question/17206790
#SPJ4
This may very well be accurate. Even then the USA is still widely regarded as a failure when it comes to everything about this. Most of the EU, Oceania, and the origin country, China, are seen as successes.
What country are you speaking of? I heard several months back about a country that had potentially completely hidden its c-19 numbers but I highly doubt it would be at this scale. I'm not even sure if the population would allow for it even with maximum infection. I would like more details please, if you can.
Cholecystitis is caused by inflammatory reactions.Hard particles that develop in gallbladder or gallstones. It block the tube which is called cystic duct through which bile flows when it leaves the gallbladder.
It is the inflammation of gallbladder , small digestive organ beneath the liver. If left untreated then it can lead to serious , in some cases its life threatening complications.Patients with cholelithiasis may develop cholecystitis , which can be chronic or acute.
Mostly, gallstones is blocking the tube leading out of your gallbladder causes cholecystitis.This condition need surgery to remove the gallbladder. In this surgery gallbladder remove surgery which is called cholecystectomy. Some case it can possible for cholecystitis to resolve on its own.
To learn more about cholecystectomy here
brainly.com/question/9906298
#SPJ4