muscle

Everyday

1. A part of the body made of stretchy tissue that tightens and relaxes to make bones and parts of the body move. tree →
2. Strength: «It takes muscle to lift that». tree →

In the lessons

In science: you have over 600 muscles; muscles work in pairs (biceps and triceps bend and straighten the arm); the heart is a muscle that never stops; some muscles you control (arm), some work by themselves (heart, stomach). In health: exercise and protein make muscles stronger; warm up before sport to avoid pulling a muscle. Phrases: pull a muscle, build muscle, muscle pain, heart muscle, muscle cramp, flex your muscles.

Examples

• Muscles help you move your bones. tree →
• Your heart is a muscle. tree →
• I pulled a muscle playing football. tree →
• Exercise makes your muscles stronger. tree →
• The biceps muscle bends your arm. tree →
• Stretch your muscles after running. tree →
• He has strong leg muscles from cycling. tree →
• You use muscles in your face to smile. tree →
• After an hour he began to move, muscle by muscle, toward the jar. tree →

Note

Spelling: the c is silent — «muscle», said «MUSS-ul». Do not confuse with «mussel», a shellfish that sounds the same. Countable: muscles. Myth: muscle does not turn into fat; they are different tissues.