Important features of the organization of mammals that allowed them to occupy a dominant position in nature.

The most important features that allowed mammals to take a dominant position in nature include: 1) a developed brain (developed forebrain with the cortex of the main hemispheres), 2) perfect sense organs (vision, smell, hearing, a large number of receptive receptors), 3) gastrointestinal -intestinal tract (differentiation of sections and lengthening), 4) full-fledged lungs with an alveolar structure (significant respiratory surface), 5) the presence of four chambers near the heart (supply of all organs with arterial blood), 6) intensive processes of respiration, digestion and blood circulation, as a result , increased metabolic rate, 7) highly developed reproductive system.