MT: Muscular System

I will understand the function of the

muscular system.

Fxn of Skeletal Muscle:

Movement Heat Production

Posture

Movement

attached to bone contracts thus producing movement

Ex: walking, talking, chewing, blinking

Heat Production

Reactions during muscle contraction produce heat

Heat contributes to constant body temperature (homeostasis of temperature)

Why do we shiver when we're cold?

Shivering is a result of muscle contraction. This produces heat thus increasing your body temperature.

Posture

Continuous partial contraction of skeletal muscles

Allows standing, sitting, and maintaining a stable body position while walking, running, and all other movements.

Fxn of Cardiac Muscle:

Pump blood

Pumping Blood

Cardiac muscle cells contract to provide all cells with blood

Blood has all of the nutrients that cells need to be healthy

Fxn of Smooth Muscle:

transport nutrients &

waste

Transport Nutrients/Waste

Smooth muscles line the inside of hollow organs and blood vessels

Ex: swallowing, digesting food in intestines, defecating, erection

Video

2. Cartoon http://www.youtube.com/watch?v=RsWNyqnHQ2I

1. Incredible Machine http://www.youtube.com/watch?v=7Rzi7zYlWno