What is a mammal?

Savba is a member of the Sammalia animal class and includes many well -known creatures, including humans. There are more than 5,000 species, most of which live on Earth, except for several species such as dolphins, whales and manatees. Mammal can be recognized by a number of unique characteristics that include the following:

• grit glands. Young is born alive, with the exception of several species, such as species in the order of monotremes that put eggs.
• Warm blood. Animals in this class have warm blood that helps them maintain a constant body temperature. They also have a heart with four chambers, a unique characteristic that allows lungs to receive oxygenated blood in the right quantity. These animals Hatělesa that are all covered with some kind of hair or fur that helps to preserve heat, and even water mammals have hair at some point during itich life.
• neocortex. The mammal has a brain section that does not occur in any other class of animals. Neocortex is a section that controls language, motor commands and conscious thoughts. While birds and some reptiles seem to be able to experience some of these characteristics, Neokortex is still unique for mammals.
• size. mammals have the biggest difference between the smallest (bats) and the largest type (blue whale): 53 million times. In comparison, no other animals approach.
• skeleton. Animals in this class have fewer bones than other animal classes; They also have a rigid cage, solid hip attachments, specialized adapted teeth, simplified limbs and increased brain case size.
• adopt tissue. mammals have a larger percentage of fat deposits than any other animal class; This helps them with energy storage and thermal insulation. Mammal can survive for a longer period of timewithout food or water than any other species on the ground.