Alveolar walls are thin to enable the quick passage of oxygen in and out of the lungs. The lungs works hand-in-hand with the heart and also is responsible in converting blood that's de-oxygenated into an oxygenated blood that is usable by the organ systems of the body. The alveolar walls are also designed to have thin membranes so that it can expand and constrict quickly allowing us to breather properly.
Answer:
The theory of evolution was proposed by Charles Darwin and was first formulated in his book, "Origin of Species" in 1859. It focuses on the changes in species and populations over time
Is Aids Curable?
Aids is part of the reproductive systems
Oral ingestion or swallowing is the
administration method that takes the longest time for the drug to reach the
brain. When using this method, the drug is swallowed through the mouth, moves to
the stomach and then into the bloodstream before it can be transported to the
brain. This means that it takes longer for a swallowed drug to start functioning
than it does with other methods of administration such as injecting.
Answer:
1) Oxygen, sugar, water and carbon dioxide are the main starting material and products of both photosynthesis and cellular respiration.
2) The diagram shows that cellular respiration which requires oxygen and sugar is the opposite of photosynthesis which requires water and carbon dioxide. The products of cellular respiration are the starting materials or photosynthesis and the products of photosynthesis are the starting materials for cellular respiration.
