The heart is divided by a partition or septum into two halves. The halves are in turn divided into chambers. The upper two chambers of the heart are called atria and the lower two chambers are called ventricles. The atria receive blood returning to the heart from the body and the ventricles pump blood from the heart to the body. Valves allow blood to flow in one direction between the chambers of the heart.
Their are 2 heart chambers.
Clams have the most complex heart of the mollusks, with 3 chambers.
Sharks have 2 chambers
A snails heart has 2 chambers.
the 2 lower chambers of the heart
The left atrium and right atrium receive blood coming into the heart.
The human heart has four chambers connected by valves. We have 2 smaller chambers on the upper half of our heart and two larger chambers on the bottom of our heart. The smaller chambers are called atria; the larger chambers are called ventricles. So we refer to these chambers as right and left atrium, and right and left ventricle.
Fish
2 atria and 2 ventricle
There are 4 chambers/rooms in the heart of bird/mammal.Here are some others...Fish-2 chambers/roomsLizard-3 chambers/rooms
there are 4 chambers; the top 2 of the heart (right and left) are called the atria and the bottom 2; the ventricles.
The heart only has 2 chambers one in the upper part and one in the lower part!