The book you hold in your hands fully aligns with the new Biology Curriculum for the 1st grade of General High School and was written to serve as a useful tool for the student, allowing them to check their knowledge at any time, as well as for the educator, with the prospect of using it in their work for student assessment. For this reason - through questions, answers, assignments, and exams - emphasis has been placed on both the structure and function of the individual organs and systems of the human body, as well as the relationship between their structure and function.

Additionally, the role of functions and the impact of factors related to the environment and the individual's lifestyle on maintaining their health have been thoroughly analyzed. Specifically, the book includes:
- Answers to the questions from the school textbook, which are found at the beginning of each chapter on colored pages for easy identification.
- Answers to the proposed assignments from the school textbook.
- Questions and detailed answers to achieve both a brief and substantial review of the theory.
- Closed and open-type questions (combinatorial and critical), with answers provided at the end of the book.
- Review exams (with their answers at the end of the book).

(from the book's preface)