Levels of Organization

Levels of Organization

• Cells

Levels of Organization

• Cells: microscopic units of living matter

Levels of Organization

• Cells: microscopic units of living matter– Each individual begins as a

single cell that is capable of mitosis and differentiation ..\Desktop\overview.mov

–As a consequence of mitosis and differentiation, four cell groups develop

1. Epithelial cells

1. Epithelial cells: examples

1. Epithelial cells: examples

Liver Cell (TEM 9,400x)

2. Connective tissue cells

2. Connective tissue cells: examples

2. Connective tissue cells: examples

2. Connective tissue cells: examples

3. Muscle cells

3. Muscle cells: examples

4. Nerve and glial cells

4. Nerve and glial cells: examples

4. Nerve and glial cells: examples

Levels of Organization, cont’d.

• Cells

Levels of Organization, cont’d.

• Cells

• Tissues

Levels of Organization, cont’d.

• Cells

• Tissues – Epithelial

Levels of Organization, cont’d.

• Cells

• Tissues – Epithelial

Levels of Organization, cont’d.

• Cells

• Tissues – Epithelial

– Connective

Levels of Organization, cont’d.

• Cells

• Tissues – Epithelial

– Connective

–

Levels of Organization, cont’d.

• Cells

• Tissues – Epithelial

– Connective

– Muscle

Levels of Organization, cont’d.

• Cells

• Tissues – Epithelial

– Connective

– Muscle

Levels of Organization, cont’d.

• Cells

• Tissues – Epithelial

– Connective

– Muscle

– Nervous

Levels of Organization, cont’d.

• Cells

• Tissues – Epithelial

– Connective

– Muscle

– Nervous

Levels of Organization, cont’d.

• Cells

• Tissues – Epithelial

– Connective

– Muscle

– Nervous

• Organs C:\WIN95\Profiles\Carey000\My Documents\My Pictures\lung.mov

Levels of Organization, cont’d.

• Cells

• Tissues – Epithelial

– Connective

– Muscle

– Nervous

• Organs

• Organ Systems

Woodcut from De Humani Corporis Fabrica by 

Andreas Vesalius, published in 1543.

Levels of Organization, cont’d.

• Cells

• Tissues – Epithelial

– Connective

– Muscle

– Nervous

• Organs

• Organ Systems

The Organism

Andreas Vesalius (1514 – 1564)