The upper chambers of the heart are calledA. AuriclesB. VentriclesC. SpiraclesD. Tentacles

The correct answer is:

A. Auricles

Explanation: The human heart has four chambers: two upper chambers and two lower chambers.

Auricles (also known as atria) are the upper chambers of the heart. There is a right auricle and a left auricle.

The right auricle receives deoxygenated blood from the body via the superior and inferior vena cava.
The left auricle receives oxygenated blood from the lungs via the pulmonary veins.
Ventricles are the lower chambers of the heart. There is a right ventricle and a left ventricle.

The right ventricle pumps deoxygenated blood to the lungs through the pulmonary artery.
The left ventricle pumps oxygenated blood to the rest of the body through the aorta.
Spiracles and tentacles are not related to the anatomy of the human heart. Spiracles are small openings used for respiration in certain animals, and tentacles are flexible, elongated organs found in some animals like octopuses.