The Spleen, Thymus, and Tonsils Are All Organs That Function

question 99

Multiple Choice

The spleen, thymus, and tonsils are all organs that function within the ___.

• A) urinary system
• B) digestive system
• C) endocrine system
• D) lymphatic system
• E) cardiovascular system

---

Definitions:

Umbilical Artery

One of two arteries that carry deoxygenated blood from a fetus to the placenta in the umbilical cord.

Ductus Arteriosus

A fetal blood vessel that connects the pulmonary artery to the aorta, allowing blood to bypass the lungs in utero, which normally closes after birth.

Foramen Ovale

An opening in the septum between the two atria of the heart in the fetus, which normally closes after birth.

Inferior Vena Cava

The inferior vena cava is a large vein that carries deoxygenated blood from the lower and middle portion of the body to the right atrium of the heart.