The heart is best described as a:
A-filtration unit
B-message center
C-muscular pump
D-storage chamber

Which is an effective way to prevent bullying and harassment

Which behavior of an expectant mother is unhealthy

Active immunity refers to: a. the defenses people are born with. b. temporary immunity granted from another source. c. immunity gained through immunization and exposure to diseases. d. natural immunities that protect humans from other animal diseases