1 Think of this as being like the skin of the avocado. Although not strictly a part of the adrenal glands themselves, the primary function of this layer is to enclose and protect each of the adrenals.  The Cortex. You might compare this layer to the flesh of an avocado.
The average lifespan for a hammy is about 2-3 years and they are very sweet!! The average life span for a hamster in general is about 2-4 years, but different breeds live differents spans. Teddy bears: 2-3 yrs. Syrian: 1 1/2- 3 yrs. Cambells, russians & other dwarfs: 1-3 yrs.
Size. With 24 species of hamsters, these animals come in a wide range of sizes. The European breed can grow as large as 13.4 inches (34 centimeters) long and are some of the biggest varieties of hamsters. The dwarf hamster lives up to its name. These tiny hamsters grow to around 2 to 4 inches (5.5 to 10.5 cm) long. The most common pet hamster, the Syrian hamster, also known as the teddy bear hamster or golden hamster, usually grows to about 6 inches (15.24 cm) long.