Question

The upper chambers of the heart are called
A. Auricles
B. Ventricles
C. Spiracles
D. Tentacles

Answer 1

Hint: The chambers of the heart are of two types – auricles and ventricles. Humans, mammals, and birds have a four-chambered heart – two auricles and two ventricles.
The fishes have two-chambered – one auricle and one ventricle, the amphibians have a three-chambered heart – two auricles and one ventricle and reptiles have two auricles and a half-divided ventricle.

Complete answer: The upper chambers of the heart are called auricles.
It receives incoming blood.
The human heart is divided into four chambers – the two upper chambers are the left atrium or auricle and right atrium or auricle. The two lower chambers are called ventricles. The right auricle is associated with the right ventricle by the tricuspid valve and the left auricle is associated with the left ventricle by the mitral valve.
The right atrium receives de-oxygenated blood from the body via the two veins – the inferior and superior venae cavae, while the left atrium receives oxygenated blood from the lungs via the pulmonary veins.

So, the correct answer is option A. auricles.

Note: There is a total of four valves that are present inside the heart.
They act like doors between the chambers of the heart.
They open and close and allow the one-way flow of blood as the heart pumps.
The other two valves are semilunar valves that are present between –
1. Aorta and left ventricle and
2. Pulmonary artery and right ventricle.
The pulmonary artery is the only artery in the body that carries deoxygenated blood and the pulmonary vein is the only vein of the body that carries oxygenated blood.