The heart is a muscular organ that pumps blood. Blood that contains waste materials is brought to the heart by blood vessels. Th is blood enters the and then moves down. The presence of the prevents the backflow of blood inside the heart
2 answers:
Answer:
the tricuspid valve and the mitral valve
Answer:
I think you mean
The heart is a muscular organ that pumps blood. Blood that contains waste materials is brought to the heart by blood vessels. This blood enters the________and then moves down. The presence of the________prevents the backflow of blood inside the heart
Explanation:
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Answer:
Oxymoron
Explanation:
Oxymoron is comparision of two opposite words placed right next to each other.
Answer:
2
Explanation:
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A positive ion is also know as a cations . A negative ion is also know as an anion . Hope this helps!
The right answer would be "C".
Answer:
a common ancestry.
Explanation: