Atria

Definition

Atria are the two upper chambers of the heart that receive blood returning to the heart from the body and lungs. They play a crucial role in maintaining efficient blood circulation and overall cardiovascular health.

5 Must Know Facts For Your Next Test

1. The right atrium receives deoxygenated blood from the body via the superior and inferior vena cava.
2. The left atrium receives oxygenated blood from the lungs through the pulmonary veins.
3. Atrial contraction helps fill the ventricles with blood before ventricular contraction.
4. Proper atrial function is essential for maintaining cardiac output and optimal blood flow.
5. Nutritional factors such as electrolyte balance can influence atrial function and overall heart health.

Review Questions

• What is the primary function of the right atrium?
• How does nutritional balance, particularly electrolytes, affect atrial function?
• Why is proper atrial function critical for cardiovascular wellness?

Related terms

Ventricles: The two lower chambers of the heart responsible for pumping blood out to the body and lungs.

Pulmonary Veins: Blood vessels that carry oxygenated blood from the lungs to the left atrium.

Cardiac Output: The amount of blood pumped by the heart per minute, influenced by both atrial and ventricular functions.