1. Chapter 5 Cell Specialization & Levels of Organization

2. Organism Organization
Organisms are highly organized.
Organization begins with the basic unit of matter – an atom
Atoms join together to make molecules – carbohydrates, proteins, lipids
Molecules join with other molecules to make cells

3. Cells join with other cells to form tissues
There are four types of tissues which make up organs
Organs make up organ systems
Organ systems make up an organism

4. Levels of Organization
Molecules
Cells
Tissues
Organs
Organ Systems
Organism
Goes from smallest to largest

5. Cell Specialization
The cells in our body are specialized to perform certain functions.
Ex. The cells lining our stomach are specialized to secrete mucous and digestive enzymes

6. Cells The body is made up of individual cells. Light receptor cells
nerve cells
muscle cells
mucous cells

7. Tissues Cells are grouped into specialized groups called tissue
Some cells which line the stomach produce digestive enzymes. Together they make up a tissue.
The cells in our eye which capture light are another type of tissue.
The cells in our muscles can contract.

8. Organs
Organs are made up of groups of tissue which work together to perform a specific function.
The Heart is made up of muscle tissue, nerve tissue and connective tissue.
The stomach is made up of muscle tissue and epithelial tissue.

9. Organ System
An organ system is a group of organs which work together to perform a specific function.
digestive system
Nervous system
circulatory system