Causing its walls to stretch and expand.

whenever I want and stretch my legs.

To test this, next time you ride in a train, pay close attention to how you feel when the train passes over a stretch of railway track without track ballast.

pay close attention to how you feel when the  train passes over a stretch of railway track  

If you grew up hearing this word pronounced watuh or watah and you learn it's spelled with an R, then adding an R to other words you hear that end with the "uh" sound isn't a stretch.

then adding an R to other words you hear that end with the “uh” sound isn't a stretch.

Sit in Vajarasana. Stand on your knees with your hands close to your thighs. Stretch your

Sit in Vajarasana. Stand on your knees with the hands close to your thighs. Stretch your

your hands close to your thighs. Stretch your arms up lean backward and slowly reaching

your right arm raising he elbow high. Stretch your hand up bring the left hand up to center

When we stretch or bend our finger, the space between the two bones increases.

This causes the synovial fluid to stretch, thus creating low pressure in it.

While yawning, we stretch our jaw and propel blood through blood vessels to the brain.

It allows our skin to stretch, twist and contract.