Mammals have 4-chambered hearts and one pair (2 total) of lungs.
Some describe the cockroach as having 13 hearts, others describe it as having a 13-chambered single heart. "A cockroach has a chain of hearts, in all totaling to 13. Some regard it as a single heart with 13 chambers. These are funnel-shaped chambers with a pair of tiny holes called ostia."
As with all mammals, the koala's respiratory system consists of a pair of lungs, a trachea (or windpipe) and the mouth and nose for breathing.
The atrium and the ventricle work as a pair. The heart has two of these pairs making the four chambers. The right pair receives blood returning from the body and pump it to the lungs. The left pair receive blood from the lungs and pump it to the body. The atriums are on top and the ventricles are on the bottom of the heart. The atrium receives the blood and pumps it to the ventricle which, in turn, pumps it to the the lungs or body. The atrium creates a supercharge or extra push, increasing the efficiency of the ventricle by about 20%.
The heart has four chambers. There are two types of chambers, the atria and the ventricles. There are a pair of each on the right and left side. Human (mammal) hearts have 4, reptiles tend to 3, and some organisms go all the way down to one.
Pandas have a pair of lungs (two).
Mammals use lungs to collect oxygen from the air, fish use gills to collect oxygen from the water.
The only mammals with wings are the Bats. Bats have a pair of wings.
Mad About You - 1992 A Pair of Hearts 2-9 is rated/received certificates of: Argentina:Atp
A pair of lungs.
Mad About You - 1992 A Pair of Hearts 2-9 was released on: USA: 18 November 1993
Reptiles typically have a pair of lungs, just like mammals. These lungs are located in the chest cavity and play a key role in respiration by exchanging oxygen and carbon dioxide with the blood.
Like all mammals, kangaroos have a pair of lungs for breathing. The lungs are part of an entire respiratory system which, in addition to the lungs, consists of the nose, pharynx, larynx, trachea and bronchi.