The alveoli are surrounded by tiny blood vessels, called capillaries carrying blood to and from the heart.
Answer:
Scientific theories are based on large amount of evidence
Explanation:
<span>So that the cells can function correctly. </span>
<span>Postthrombotic syndrome involves the formation of blood clots in the body and that is its hallmark. Some of the symptoms include leg pain and swelling. Lipodermatosclerosis involves problems with veins in the leg and is evident by changes in the lower legs.</span>
3 nucleotides code for an amino acid
