Amphibians are the first land animals. To move on land, they have new sections of the skeleton – these are free front and hind limbs. The bones in them are connected by joints and consist of three sections. To attach the limbs to the skeleton, the structure of their belts has become more complicated, since they also serve as a support. The number of bones in the skull and spine has decreased, which made the body more compact for ease of movement on land. A cervical vertebra has appeared, allowing you to tilt your head.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.