A dichotomous key is very easy to use because it provides only two choices.
If you need a further explanation let me know!
Hope this helps!
The heart is contracting . Diastolic is when the heart is relaxing.
An air mass is a large volume of air in the atmosphere that is mostly uniform in temperature and moisture. Air masses can extend thousands of kilometers across the surface of the Earth, and can reach from ground level to the stratosphere—16 kilometers (10 miles) into the atmosphere.
Air masses form over large surfaces with uniform temperatures and humidity, called source regions. Low wind speeds let air remain stationary long enough to take on the features of the source region, such as heat or cold. When winds move air masses, they carry their weather conditions from the source region to a new region. When the air mass reaches a new region, it might clash with another air mass that has a different temperature and humidity. This can create a severe storm.
Answer:
The aorta is the main artery that carries blood away from your heart to the rest of your body.
Explanation:
