The Anatomic Structure That Is Not in the Thoracic Cavity

question 13

Multiple Choice

The anatomic structure that is not in the thoracic cavity is/are the _____.

• A) heart
• B) lungs
• C) blood vessels
• D) transverse colon

---

Definitions:

Zygote

The initial cell formed when two gamete cells are joined by means of sexual reproduction, representing the earliest developmental stage of the embryo.

Teratogens

Any agent that can cause developmental malformations (birth defects) in an embryo or fetus.

Prenatal

Pertaining to the period before birth, from conception to the onset of labor.

Newborns

Infants in their first few hours to weeks of life, particularly before they are one month old, encompassing the very early stages of development.