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The Body Systems
The Integumentary System
The Muscular System
The Skeletal System
The Nervous System
The Endocrine System
The Cardiovascular System
The Respiratory System
The Digestive System
The Urinary System
The Reproductive System
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The Muscular System
Do you even Lift Bro?
What's in a Muscle?
muscles are made of:
muscle fibers
myofibril
actin myofilament and myosin myofilament
sarcomere- segment of myofibril
signal comes from the nervous system
message starts in the spinal cord
neurotransmitters sent which causes a reaction in the muscle causing it to contract
what is a Muscle?
More than 600 muscles in the body and make up 40% of your weight
Muscle functions
Movement (voluntary and involuntary)
maintains posture
generates heat
stabilizes joints
Types of Muscle Tissue
How does the a muscle contract?