Answer:
D. vena cava → right atrium → right ventricle → pulmonary artery
Explanation:
This is an example of pulmonary circuit.
Venae cavae are a vessels (vena cava interior and superior) that carriy deoxygenated blood from the body to the right atrium. From the right atrium through the tricuspid valve the blood goes into the right ventricle. Then, from the right ventricle through the pulmonary valve the blood goes into the main pulmonary artery which carries deoxygenated blood to the lungs (to recieve oxygen).
Answer:
PCBs and DDT are chemicals that were banned more than 30 years ago, but our air, water, land, and bodies are so contaminated that decades of cleanup efforts have yet to eliminate their threats to our health. Today, food is one of the most likely exposure routes to PCBs.
According to the science journal of mathematically correct science the entire cell would break down because of all the substances passing through it. Therefore after a while there would be no cell and the animal or plant would no longer exist. -approved by the scientists of massachusets - written by proffessor Gordon amphion
Answer:
C. Fe2O3 + 2Al → 2Fe + Al2O3
One fourth means (one half) of (one half) .
So the 18 months must be two half-lifes.
The half-life of this particular isotope is 9 months.
