The answer you are looking for is the production output.
A barter is negotiating the trade of one good to another. this is easier with coins because is has the same worth for everyone, whereas if goods were being negotiated, it would be more difficult because the worth may vary from person to person.
When you want to find the most important leader of a nation, it is useful to know whom the nation itself calls "the Great" - in the case of the Persians it was Cyrus the Great (he lived in the 6th Century BC) - we has the founder of the first Persian Empire. Among his contributions is that he expanded the area ruled by the Persians.
Nares provide an opening for air to enter the nasal cavity.
Air enters the nasal cavity from the outside through two openings: the nostrils or external nares. The openings from the nasal cavity into the pharynx are the internal nares.
The nasal cavity and mouth join at the area in the back of the throat called the oropharynx . The pharynx is part of two body systems (the respiratory system and the digestive system) because it carries both air and food.
At the bottom the pharynx is divided in to two pipes- one for air and one for food. One pipe, the larynx, is for air only. It’s also called the voice box because it contains a pair of vocal cords that vibrate to make sounds when you talk.
A small flap of tissue called the epiglottis protects the larynx. When we swallow, the epiglottis covers the larynx to prevent food and liquid from going into the lungs.
The trachea (windpipe) is the part of the airway that continues below the larynx .
The carina is at the bottom of the trachea and is the point at which the trachea divides into the left and right main bronchus leading to the lungs.
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