Hour 4 Introduction of Human Anatomy and Physiology

AN INTRODUCTION TO HUMAN BODY

HUMAN IS A LIVING ENTITY

Like all living things, human also grow, respire, have a cellular organization, show metabolism and respond to stimuli. On the contrary, non-living things do not show any of these characteristics.

LEVELS OF ORGANIZATIONS

The human body is organized in several levels, from the simplest to the most complex.

• Cells – the basic unit of life
• Tissues – clusters of cells performing a similar function.
• Organs – made of tissues that perform one specific function.
• Organ Systems – groups of organs that perform a specific purpose.

CELL: THE BASIC UNIT OF LIFE

• Discovered by Robert Hooke in 1665 from Potato Peel
• Structural Unit of all living organisms
• Functional Unit of all living organisms

 SYSTEMS OF HUMAN BODY

There are mainly 9 systems found in a human body. These systems work in a highly coordinated manner and maintain “Homeostasis”.

1. Digestive System
2. Respiratory System
3. Circulatory System
4. Excretory System
5. Skeletal System
6. Muscular System
7. Neural System
8. Endocrine System
9. Reproductive System