Specialized tissue that enable the body and its parts to move.

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Specialized tissue that enable the body and its parts to move.

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Presentation transcript:

Specialized tissue that enable the body and its parts to move. The Muscular System Specialized tissue that enable the body and its parts to move.

Anterior View

Posterior View

TRIVIA! How many muscles are there in the human body? Answer: 640 Muscles The muscles make up about 40 % of the body mass. What is the longest muscle in the body? Answer: The Sartorius The Sartorius runs from the outside of the hip, down and across to the inside of the knee. It twists and pulls the thigh outwards. What is the smallest muscle in the body? Answer: The Stapedius The Stapedius is located deep in the ear. It is only 5mm long and thinner than cotton thread. It is involved in hearing. What is the biggest muscle in the body? Answer: The Gluteus Maximus The Gluteus Maximus is located in the buttock. It pulls the leg backwards powerfully for walking and running.

Functions of the Muscles Movement Maintain Posture Heat production Protects the bones and internal organs.

How do muscles work? Muscles work in pairs One muscle contracts (flexes) while the other extends

Practice these Movements Bend arm - biceps  contract - triceps  extend 2. Straighten arm - biceps  extend - triceps  contract 3. Bend knee - quadriceps  extend - hamstrings  contract

The 3 Types of Muscles

Smooth Muscle They fatigue… but very slowly Controls travel through the body Found in the circulatory system Lining of the blood vessels Helps in the circulation of the blood Found in the digestive system Esophagus, stomach, intestine Controls digestion Found in the respiratory system Controls breathing Found in the urinary system Urinary bladder Controls urination They fatigue… but very slowly

Cardiac Muscle Found ONLY in the heart Contractions of the heart muscles pump blood throughout the body and account for the heartbeat. Healthy cardiac muscle NEVER fatigues  or else…

Skeletal Muscle Attached to bone by tendons Causes movement of bones at the joints. And yes… they do fatigue Muscle fatigue activity  what substance forms causing muscle fatigue???

Muscle Classification Voluntary – can be moved on purpose Involuntary – move on their own

Structure of Skeletal Muscle Tendons anchor muscle firmly to bones. Tendons are made of dense fibrous connective tissue. Ligaments connect bone to bone at a joint.

There are about 60 muscles in the face. Smiling is easier than frowning. It takes 20 muscles to smile and over 40 to frown. Smile and make someone happy.