Levels of Organization
-Level 2 – Tissues
It is created by joining cells that have similar function or structure.
-Level 3 – Organs
An organ is a group of tissues that perform a specific function or group of functions
-Level 4 - Systems
An organ system is a collection of organs that perform a specific function, like the circulatory system or digestive system.
-Level 5 – Organism
An organism is a being that's able to perform simple acts of survival. We humans are one.
LEVELS OF ORGANIZATION (YEAR 6)
1. Atomic level
The basic unit or component of organization in both living and non-living object is an atom. An atom is, of course further made of still smaller particles like electrons, protons and neutrons.
2. Molecular level
Atoms combine with one another to form molecules Examples are:
- pure water ( H2O)
- sodium chloride ( NaCl – also called table salt)
- glucose ( C6H12O6)
- proteins
- carbohydrates
- lipids
3. Cellular Level
Living beings are made of one cell (unicellular organisms) or numerous cells (multicellular organisms).
4. Tissue Level
In multicellular organisms the cells may be similar (colonial organisms) or organized into distinct functional units called tissue. A tissue is a group of cells with similar structure performing the same function
There are four basic types of tissue found in the human body:
- Epithelial (skin)
- Connective
- Muscular
- Neural
5. Organ Level
Two or more tissues are organized into distinct structures called organs . Organs are specialized for performing one or more functions e.g. pumping by heart, photosynthesis by leaves.
6. Organ system Level
Two or more organs coordinate their activities towards a common activity e.g. digestive system, respiratory system.
7. Organismic level or Individual level
Living beings are called organisms because they possess high level of organization. They are called individuals as each organism has a distinct interact or individuality.
8. Population level
All the individuals of a species found in an area where they can interact with one another is called population.
9. Community level
The populations of different species found in an area also interact with one another . They constitute a biotic community.
10. Ecosystem Level
The biotic community of an area and its abiotic environment together form an ecosystem.
11. Biosphere level
All the ecosystems of the world interact further and form biosphere or livable space of the earth. An organism is, therefore, not only an individual but also a part of population, community, ecosystem and biosphere.
Biosphere has the highest level of organization. Organizations at level of individual and above are known as higher levels of organisation.
