Nitrogen and Oxygen Are the Most Abundant Gases in the Atmosphere

question 41

True/False

Nitrogen and oxygen are the most abundant gases in the atmosphere.

---

Definitions:

Biochemical Barrier

Natural or artificial barriers at the cellular or molecular level that prevent or control the passage of harmful substances, often part of innate immune defense.

Conceptus

The entity formed from the fertilization of an egg by a sperm until it becomes an embryo, encompassing stages like the zygote and blastocyst.

Fetal Circulatory System

The circulatory system of a fetus that involves unique structures like the umbilical cord, placenta, and ductus arteriosus for nutrient and waste exchange and for bypassing the lungs.

Trimester

One of the three approximately three-month periods into which a pregnancy is divided.