The space in the thoracic cavity between the concave inner surfaces of the lungs, in which (in a special pericardial cavity) the heart is located, is called the mediastinum. The thoracic cavity is lined with a serous membrane called the pleura. The lungs are enclosed in the so-called pleural cavities, which are separate in man but communicate with one another in the majority of mammals. The shape of the thoracic cavity depends upon the shape of the thorax and the position of the diaphragm.
We sell 5 hammock sizes on the Traditional Hammocks (no spreader wood bars). Therefore, the length of the hammock is the same for each size but the difference is the width. Width gives the size. The larger the size, the wider and bigger the hammock.
They can normally be kept in a cage with other dwarf hamsters but you still need to check for any signs of upset or aggression, at which point they may need to be separated. The Roborovski dwarf hamster is the smallest of the dwarf hamsters, and doesnât grow much more than 3 inches in length, even as an adult. Roborovski dwarf hamsters are very fast and active; they have often been known to run as far as 100 miles per night on their hamster wheel.