The Source(s)of Sulfur Dioxide in the Atmosphere Is/are ________

question 126

Multiple Choice

The source(s) of sulfur dioxide in the atmosphere is/are ________.

• A)volcanic gases
• B)forest fires
• C)bacterial action
• D)fossil-fuel combustion
• E)all of the above

---

Definitions:

Foramen Ovale

An opening in the septum between the right and left atria of the fetal heart, which normally closes shortly after birth.

Ligamentum Arteriosum

The ligamentum arteriosum is a small ligament that is a remnant of the fetal circulation's ductus arteriosus, connecting the aortic arch to the pulmonary artery, closing shortly after birth.

Fossa Ovalis

A depression in the interatrial septum of the heart, the remnant of the foramen ovale of the fetal heart.

Left Atrium

One of the four chambers of the heart, which receives oxygenated blood from the pulmonary veins and pumps it into the left ventricle.