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Cells to Tissues to Organs to Organ Systems

muscle tissue

muscle cells group together to form


muscle tissue group together to form

organ systems

organs group together to form


muscle nervous and epithelial tissue

digestive system

tongue esophagus and intestines

Four basic tissue types

muscle nerve connective epithelial


contract or relax makes them shorter or thicker
stimulated by nervous tissue
600 in the body
work in pairs one contracts the other relaxes

muscle types

Involuntary Skeletal Cardiac Nerve Connective Epithelial

muscle pairs

bicep andtriceps
flexor andextensors
deltoid and pactoralis

strength and flexibilty

increased with exercise


brings more blood to the muscles
more blood= more oxygen= more respiration= more energy

muscle injuries

strain, tendon injury, cramp


overworked or stretched
may have small tear in the muscle, blood vessel or nerve fibers
caused by sudden or other quick movements and you haven't warmed up
pain even when at rest redness swelling
ice packs rest ibuprofen for a few days

Tendon injury

can be strained or torn
if strained treat like a strain
if torn get surgery


a skeletal muscle contracts on its own or twitches uncontrollably usually calf, thigh, or arch of foot muscle
may be caused byoveruse or imbalance of electrolytes


275 at birth
206 at adult

major functions of skeletal system

provide shape and support
allows movement with help from muscles
protects your organs
produces blood cells
stores minerals until your body needs them

vertebral column

26 small bones called vertebrae
can slide about 12 degrees to the left or right
column can rotate

joints of skeleton

joint-where two bones meet
allow for different types of movement
hinge joint knee and elbow

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