tissues and organs section 15-1

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Tissues and Organs Section 15-1 1

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5 Levels of Organization A single cell Tissues Organs Organ Systems Organism

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Page 1: Tissues and Organs Section 15-1

Tissues and Organs

Section 15-1

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Page 2: Tissues and Organs Section 15-1

5 Levels of Organization

A single cellTissuesOrgansOrgan SystemsOrganism

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Page 3: Tissues and Organs Section 15-1

Tissues

A tissue is a group of similar cells that perform the same function.

There are 4 basic types of tissue in the human bodyMuscleConnective Nerve Epithelial

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Page 4: Tissues and Organs Section 15-1

Muscle Tissue

The only kind of tissue in your body that has the ability to contract or shorten

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Photo in public domain: http://en.wikipedia.org/wiki/File:Illu_muscle_tissues.jpg

Page 5: Tissues and Organs Section 15-1

Muscle Tissue

Three types of muscle tissue have different jobs1. Pulls on bones allowing you to move

(skeletal)2. Lines the walls of structures in your body

and does things like move food through your digestive track (smooth)

3. Pumps blood (cardiac)

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Page 6: Tissues and Organs Section 15-1

Connective Tissue Provides support

for your body and connects all its parts

Includes: Tendons,

cartilage and ligaments

Bones Blood Fat

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Photos in public domain

Page 7: Tissues and Organs Section 15-1

Nerve Tissue

Carries messages back and forth between the brain and spinal cord and every other part of your body

Messages can move at up to 100 meters per second (about 1/3 the speed of sound)

7The Brain contains about 1 trillion neurons – the cells that make up nerve tissue.

Photo from BrainMaps.org

Page 8: Tissues and Organs Section 15-1

Epithelial Tissue

Forms a protective surface on the outside of your body

Lines the cavities of the mouth, throat, ears, stomach and other body parts.

Forms the covering or lining of all internal and external body surfaces

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Page 9: Tissues and Organs Section 15-1

Functions of Epithelial Tissue

Protection Sensation Secretion AbsorptionExcretion Diffusion Cleaning Reduces Friction

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Page 10: Tissues and Organs Section 15-1

Forms of Epithelial Tissue

Diagram in public domain: http://ms.wikipedia.org/wiki/Fail:Illu_epithelium.jpg

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Page 11: Tissues and Organs Section 15-1

Organs

A group of different tissues that has a specific function

Examples:

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Page 12: Tissues and Organs Section 15-1

Organ Systems

Groups of organs working together

Examples:

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