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Did you know?

More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

Did you know?

Your heart beats over 36 million times a year.

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

Did you know?

Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

Muscle Contraction Muscle Contraction
The patellar reflex. (A) Striking the patellar ligament excites the quadriceps muscle spindles.(B) ... The patellar reflex. (A) Striking the patellar ligament excites the quadriceps muscle spindles.(B) ...
Structure of a myofiber (muscle cell) Structure of a myofiber (muscle cell)
A cross section of muscle showing the molecular organization within the muscle fiber. In normal musc A cross section of muscle showing the molecular organization within the muscle fiber. In normal musc
horse muscle horse muscle
Blood tissue Blood tissue
Video: Transferring genes into plants Animation

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