21 Aug 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”.
- Digestive System
- Respiratory System
- Circulatory System
- Excretory System
- Skeletal System
- Muscular System
- Neural System
- Endocrine System
- Reproductive System