BIO201 – Topic 1: Introduction to Human Biology
Course Code: BIO 201
Course Name: Human Biology
© Lesuyai Organic Guides 2025
(Original | Educational | Professional | Plagiarism-Free | 2025 Edition | A4 Format)
1.1 Introduction to Human Biology
Human Biology is the study of human structure, function, growth, evolution, and adaptation. It
forms the foundation for understanding health and disease.
1.2 Definition of Human Biology
Human Biology is the scientific study of humans from biological, physiological, genetic, and
evolutionary perspectives.
1.3 Importance of Studying Human Biology
1. To understand how the human body functions.
2. To prevent, manage, and treat diseases.
3. To promote health and wellbeing.
4. To appreciate human diversity and adaptation.
5. To form a basis for careers in medicine, nursing, and biotechnology.
1.4 Branches of Human Biology
- Anatomy – Body structure
- Physiology – Functions of body organs and systems
- Genetics – Inheritance and variation
- Biochemistry – Chemical reactions in the body
- Histology – Microscopic tissue structure
- Embryology – Human development
- Evolutionary Biology – Human origin and adaptation
1.5 Levels of Organization in the Human Body
1. Chemical level
2. Cellular level
3. Tissue level
4. Organ level
5. System level
6. Organism level
1.6 Characteristics of Living Human Organisms
- Movement
- Growth
- Reproduction
- Metabolism
- Responsiveness
- Homeostasis
Course Code: BIO 201
Course Name: Human Biology
© Lesuyai Organic Guides 2025
(Original | Educational | Professional | Plagiarism-Free | 2025 Edition | A4 Format)
1.1 Introduction to Human Biology
Human Biology is the study of human structure, function, growth, evolution, and adaptation. It
forms the foundation for understanding health and disease.
1.2 Definition of Human Biology
Human Biology is the scientific study of humans from biological, physiological, genetic, and
evolutionary perspectives.
1.3 Importance of Studying Human Biology
1. To understand how the human body functions.
2. To prevent, manage, and treat diseases.
3. To promote health and wellbeing.
4. To appreciate human diversity and adaptation.
5. To form a basis for careers in medicine, nursing, and biotechnology.
1.4 Branches of Human Biology
- Anatomy – Body structure
- Physiology – Functions of body organs and systems
- Genetics – Inheritance and variation
- Biochemistry – Chemical reactions in the body
- Histology – Microscopic tissue structure
- Embryology – Human development
- Evolutionary Biology – Human origin and adaptation
1.5 Levels of Organization in the Human Body
1. Chemical level
2. Cellular level
3. Tissue level
4. Organ level
5. System level
6. Organism level
1.6 Characteristics of Living Human Organisms
- Movement
- Growth
- Reproduction
- Metabolism
- Responsiveness
- Homeostasis
