Answer:
alveoli
Gas Exchange with Tissues
Gas exchange occurs in the alveoli so that oxygen is loaded into the bloodstream and carbon dioxide is unloaded from the bloodstream. Afterwards, oxygen is brought to the left side of the heart via the pulmonary vein, which pumps it into systemic circulation.
Explanation:
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because different scientists have different theories or explainatons on how the universe came into being so that's why the origin of the universe is still a question
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Answer:
Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function. Unicellular organisms include bacteria, protists, and yeast.
The phases go prophase, metaphase, anaphase, and telophase starting with interphase. But the first stage would be Interphase.
The food group is fats (sweets and oils)