Made up of protein fivers plus liquid, jelly or solid substance.

This is part of the Connective tissue system.

3 types

1.) Collagenous fibers: nonelastic, provide strength.

2.)Elastic fibers: gives tissue elastic properties.

3.) Reticular fibers: joins connective tissues with surrounding tissues. 

Weaves together epithelia and other tissues.

Acts as packing material between organs

• Provides strength but flexibility
• Unlike bone,  not mineralized 
•  Can cushion joints

• Stores Fat
• Pads and insulates body
• Fuel Source

• Mineralized connective tissue
• Provides support and protection for the body.

Characteristics: Made of long cells called muscle fibers (actin and myosin)

Functions: Contraction of musclefibers allows movement. 

• Attached to bones by tendons.
• Striated appearance
•  Function: voluentary body movements.

Forms Contractile wall of the heart

• Striated
•  Function: Heart contraction 

3.) Smooth Muscle

Found in the walls of organs

Non-striated, spindle shaped.

Function:involuntary body movements. 

Composed of cells called neurons and glial cells

• sense stimuli
• transmit information
• Coordinate responses
• Common location: Brain, spinal cord, nerves

Drives cellular processes

• Signaling between cells
• Muscle contraction

Body size influences physiological processes

• Surface to volume ratio
• this affects diffusion of molecules.

Affects diffusion of molecules

• More complex organisms have Highly folded internal structures
•  increases effective surface area for diffusion.

Gives tissue elastic properties

(Connective tissue I think)

Resting metabolic rate in ectotherms

-Measured at a specific temperature.

2.) Energy use "strategy"

-Endotherms vs ectotherms

3.) Activity

-increases with skeletal muscle activity.

4.) Temperature

• Ectotherms-increases with temperature.
• Endotherms- Increases with deviation in temperature.

5.) Eating and digesting food

6.) Growth rate

7.) Reproductive state

8.) Environmental Stress