True.
<span>The trachea is about 10 cm long and it has an approximate diameter of 2 cm. It is located anterior to </span>(in front of) the esophagus and posterior to (behind) the isthmus of the thyroid. The right and left main bronchi are branches of the trachea. This division occurs at the level, or just below the level, of the sternal angle, also known as the manubriosternal joint.
An ecological niche is an organism's specific habitat in an ecosystem.
It is where it lives and feeds, etc.
I think the uterus , but im not sure.
True because they are used to this system
