The kidney is not only an important excretory organ, but also an important regulatory organ and endocrine organ that maintain the stability of the body's environment.

The respiratory system includes a series of organs that inhale oxygen, discharge carbon dioxide, and complete gas exchange.

The professional ethics requirements of nursery teachers are the most basic requirements for nursery teachers, and everyone must abide by them.

Baby nurses are mainly engaged in the care, nursing and education of infants between 0 and 3 years old. With reference to national professional standards, the profession can be divided into three levels: elementary, intermediate, and advanced.

Infant development refers to the process of an orderly, continuous, phased, and gradual process from differentiation to complete psychological changes from the beginning of life, influenced by factors such as genetics, environment, and learning.