1. Levels of Organization
Cells: Part II
Levels of Organization

2. Many celled organisms ARE NOT just mixed up collections of different types of cells. They are ORGANIZED in a certain way.
The levels of organization are as follows:

4. CELLS
ORGANIZED so they can work together.
Sickle cell
Normal cell

5. TISSUES
TISSUES are GROUPS of similar cells that all do the same sort of work.
Examples: blood, muscle, bone
Muscle tissue is made of MUSCLE cells, bone tissue is made of BONE cells, etc.

6. Tissue within the stomach
Smooth MUSCLE tissue
Loose CONNECTIVE tissue
Nervous tissue
COLUMNAR epithelium tissue
(Connective tissue is the BLOOD in the walls of the stomach.)

7. ORGANS ORGANS are different types of tissues working together.
Examples: Stomach, LIVER, heart, skin, etc.
Stomach is made of MUSCLE tissue, NERVE tissue, & BLOOD tissue

9. Stomach + mouth + intestines + liver = DIGESTIVE SYSTEM
ORGAN SYSTEMS
ORGAN SYSTEMS are a group of organs WORKING together to do a certain JOB.
Examples: respiratory, circulatory, DIGESTIVE, reproductive, nervous
Systems ARE DEPENDENT on other systems in your body
Stomach + mouth + intestines + liver = DIGESTIVE SYSTEM

10. Digestive system

11. ORGANISMS
Entire LIVING things that can carry out all basic life PROCESSES.
Usually made up of organ SYSTEMS
May be made up of only one CELL such as bacteria or protist.
Examples - bacteria, amoeba, mushroom, sunflower, HUMAN (YOU!!)