That when we sing: Sound comes out of our mouths at approximately 75 miles per hour. It is 1/2200 second, from the time that the sound is made until it exits your mouth.
Women generally have easier access to the upper registers particularly head voice compared to men. In contrast, men have a much stronger command of their lower registers because of the size and shape of their vocal folds (cords).
A normal person without exceptional ability should be able to sing two and a half octaves without straining, breaking, or any other weird noise.
You have two sets of muscles that control the vocal chords, one in front and one in the back that act like zippers to open or close the chords to make a certain pitch. The farther outside of you optimum pitch you go, the more delicate the balancing act between the two. That is where practice comes in
The website when you click on it, it brings up a YouTube video of a choir singing my favorite song "Omnia Sol". While I was in Cordova, Alaska for Music Festival, our mass choir sang this song and I fell in love with it.