Only to use nitrates when heart pain is active and progressing. Afterwards, see your heart specilist..
egg (female) and sperm ( male)
Antibiotics germs killed immune system in the human body
Answer:
Keystone Species
Explanation:
A species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.
Answer:
Muscles are involved in the digestive system, immune system, and excretory system.
