Low white blood cell count and cancer. White blood cells fight infections from bacteria, viruses, fungi. and other pathogens (organisms that cause infection). One important type of white blood cell is the neutrophil. These cells are made in bone marrow and travel in the blood throughout the body.
Apo Hsu, using a baton, conducts the NTNU Symphony Orchestra in Taipei, Taiwan. Steven Sametz conducting the Lehigh University Choir without a baton. Conducting is the art of directing a musical performance, such as an orchestral or choral concert.
A US Marine performs plyometric jumps in Camp Foster, Okinawa. Plyometrics, also known as jump training or plyos, are exercises in which muscles exert maximum force in short intervals of time, with the goal of increasing power (speed-strength). This training focuses on learning to move from a muscle extension to a contraction in a rapid or explosive manner, such as in specialized repeated jumping.