Are all the chambers in the same size?

Are all the chambers of the same size?

Are all the chambers connected to each other?

Are all flowers of the same size and shape ?

Do all the leaves have the same shape?

Why are the lungs not of the same size?

In human body A is a pumping organ from lungs blood vessel B with oxygenated blood enters upper C part of left chamber of the organ. When "C" chamber contracts blood flows into "D" lower left chamber. "D" chamber contracts blood is pumped to all parts of the body except lungs through blood vessel E. Deoxygenated blood from body parts is collected by blood vessel "F " and opens upper "G" right chamber. This chamber contracts blood flows into "H" lower chamber. Lastly "H" contracts Deoxygenated blood sent to lungs by blood vessel "I" d) (i) G (ii) H are what chambers ? write their names.

The additional chambers in the digestive tract of birds are