About 160 years. After Charles Darwin came out with his theory people have been debating it.
Answer: Platelets release a vasoconstricting substance called <u>SEROTONIN.</u>
Answer:
The oesophagus (gullet) is part of the digestive system, which is sometimes called the gastro-intestinal tract (GI tract). The oesophagus is a muscular tube. It connects your mouth to your stomach.
The answer is B Have a great day sweetie
Genetics is what I would say
