Upgrade to remove ads
Only $35.99/year

muscuar system

Terms in this set (17)

how many muscules are in the human body
600
Functions of muscles
-needed for all types of movement
-needed to pump blood
-needed to breathe (diaphragm muscules)
-needed to produce body heat and reduce body temp.
-nedded to protect the interal organ
what are the 3 types of muscles
1.sketetal-voluntary/movement of your bones,face,eyes,etc
2. cardiac-involuntary/movement of your heart and certain blood vessles
3.smooth-Involuntary/Movement of your intestines, esophagus, and other internal organs
skeletal muscle
-Move your bones (also your face, eyes etc)
-Voluntary (you can control them)
-Over 400 skeletal muscles in your body
-Long cells with several nuclei (along edges of cell)
-Stripes called striations in cell (visible in high power)
-mutlnucliated
straited
cardiac muscle
-The muscle of the Heart Involuntary (you cannot control them)
-Works 24 hours a day every day of your life!!!
- Strongest type of muscle
-Only one nucleus per cell (usually in center of cell)
-Some striping (striations) but not as much as skeletal muscle
smooth muscle
-The muscles of the esophagus, stomach, intestines and other internal organs
- Involuntary (you cannot control them)
-Contract slowly and smoothly
-Can remain contracted for long periods of time
- Usually one nucleus per cell (usually in center of cell) -No striping (striations)
fascicle
bundle of muscle fibers
muscle fiber
muscles cells
musclues to tendo to bones
tendons attatch to muscles to bone
muscles work in pairs(biceps and triceps)
The biceps(2) muscle will bend the arm at the elbow and the triceps(3) muscle will straighten the arm.
While one muscle in the pair contracts the other must
relax
Ligaments
hold bones together at joints
A skeletal muscle works by
CONTRACTING (getting shorter).
The muscle can shorten as much as____ its resting length.
1/3
Each muscle cell is made up of many smaller
MYOFIBRILS
The MYOFIBRILS are in contact with a nerve ending. ---
-The nerve releases a chemical called a NEUROTRANSMITTER.
- The Neurotransmitter
stimulates the entire muscle cell to contract
Other sets by this creator