Using the drop-down menus, identify the parts of
the lower respiratory system from the descriptions
below.
are enclosed in a membrane
The
called the pleura.
The
are branch-like extensions
found in the lower respiratory system.
Identify the structures labeled in the diagram to
the right
Label A
In the 1930s, medical journal
articles linked asbestos to cancer.

lungs

bronchioles

alevoli

positive impact

Explanation:

on Edge

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.