Because lung transplants can easily fail and most of the time lungs are so vulnerable to infection.
Answer:
Biologists, all they do is get their phD and watch as evolution happens around them.
Explanation:
The answer is adrenal glands. They are 2 small glands that are located above the kidneys and produce hormones such as the stress hormones. They are also responsible in maintaining the normal function of the body which includes the immune system, blood pressure and the reproductive organs.
Cell- <span>the smallest structural and functional unit of an organism, typically microscopic and consisting of cytoplasm and a nucleus enclosed in a membrane. Microscopic organisms typically consist of a single cell, which is either eukaryotic or prokaryotic.</span>
1 is D, 2 is E, 3 is B, 4 is A, 5 is C, 6 is D, 7 is B, 8 is A.
