Question

How does blood enter the right atrium?

From the Inferior and superior venacava's
From the pulmonary artery
From the aorta
From the right ventricle

Answer 1

Blood enters the right atrium through two large veins called the superior vena cava and the inferior vena cava.

Step-by-step explanation:

The right atrium receives oxygen-poor blood from the body. The blood flows into the right atrium through two large veins called the superior vena cava and the inferior vena cava. The superior vena cava collects blood from the upper body, including the head, neck, chest, shoulders, and upper limbs. The inferior vena cava collects blood from the lower body, including the abdominal and pelvic regions and the lower limbs.