Jackson Holliday will be put to the test early this season as Orioles star Gunnar Henderson misses time with an injury.

When muscle cells are viewed under the microscope, one can see that they contain a striped pattern (striations). This pattern is formed by a series of basic units called sarcomeres that are ...

Skeletal muscles Learn about the muscles that work ... How to observe cells under a microscope Discover how to observe cells using a microscope.