Transcript Muscles - Ballou STAY High School

Muscles
• Muscle is one of our 4 tissue types
that makes up those muscle organs
that are familiar to us.
• Muscles are quite complex and as
we’ll find out, they are a marvel of
biology.
Muscle Functions
1. Production of Movement
– Works with the skeletal
system to allow movement
– Muscle fibers contract and
relax
– Muscle pairs work together.
One shortens and pulls while
the other relaxes
Muscle Functions
2. Posture of posture
– Muscle contraction is
constantly allowing us to
remain upright.
– The muscles of your
neck are keeping your
head up right now.
– As you stand, your leg
muscles keep you on
two feet.
Muscle Functions
3.
Thermogenesis
– Generation of heat.
Occurs via shivering
– an involuntary
contraction of
skeletal muscle
3 Types of Muscle Tissue
Smooth Muscle
Involuntary- no control..
• Occurs within almost every organ
Examples:
• Cardiovascular system
• Digestive systems
• Integumentary system
• Respiratory system
• Urinary system
• Reproductive system
Voluntary
• Can control them.
• ALL skeletal muscles!!
Thought questions: why do chickens have white
breast meat and dark leg meat? What does this say
about the activities of the associated muscles? Why
do ducks have dark breast meat?