B. The period of interaction beween the Islamic and Mongol empires.
C. The period between the Greek and the Roman dominance over European culture.
D. The period following the decline of the Roman Empire in Europe.
Answer: The period following the decline of the Roman Empire in Europe.
Explanation: A p e x
Venaecavais not a component of the pulmonary circuit.
The correct Option is 'E'.
The pulmonary circuit is responsible for carrying oxygen-poor blood from the heart to the lungs for oxygenation and then returning oxygen-rich blood to the heart.
Its main components are the right ventricle, which pumps deoxygenated blood into the pulmonary arteries, which carry it to the lungs. In the lungs, the blood is oxygenated through diffusion in the pulmonary capillaries.
Finally, oxygen-rich blood returns to the heart via the pulmonary veins, not the venae cava, which are part of the systemic circuit, responsible for distributing oxygenated blood to the rest of the body.
The venae cava bring deoxygenated blood from the body to the right atrium, initiating the systemic circulation. So, the venae cava are not part of the pulmonary circuit.
To learn more about Venaecava.
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B. during a first quarter moon
C. during a waxing gibbous moon
D. during a waning crescent moon
Answer:
The correct answer will be- the bark of an oak tree by Antonie Van Leeuwenhoek
Explanation:
The development of light microscopy began before the 18th century where a scientist named Antonie Van Leeuwenhoek observed the first living cells of the organisms.
Although the first cell was observed by the Robert Hooke when he observed the dead cells of the bark of a tree bu the light microscope designed by the Leeuwenhoek helped him to observe the living cells from the pond life and he also observed the bark of an oak tree.
Thus, the bark of an oak tree by Antonie Van Leeuwenhoek is considered the first cell.