The Structure That Permits Blood Flow from the Right Atrium

question 54

Multiple Choice

The structure that permits blood flow from the right atrium to the left atrium in the fetal circulation is the

• A) foramen ovale.
• B) interatrial septum.
• C) coronary sinus.
• D) fossa ovalis.
• E) ligamentum arteriosus.

---

Definitions:

Neuron

A specialized cell transmitting nerve impulses; a nerve cell.

Fibrocartilage

A tough, dense type of cartilage that provides substantial support and withstands heavy pressure.

Elastic Cartilage

A type of cartilage that contains elastic fibers, allowing it to stretch and return to its original shape, found in structures like the ear and epiglottis.

Hyaline Cartilage

A type of connective tissue found in various parts of the body, providing support with some flexibility, such as in the nose, trachea, and at the ends of ribs.