Arteries are blood vessels which transport blood away from the heart. Arterioles are the same as arteries except the are smaller .

Astropecten articulatus - The Royal Starfish. Bohadschia argus - The Leopard Sea Cucumber. Echinus melo - The Melon Sea Urchin. Helix aspersa - The Garden Snail. Loligo vulgaris - The European Squid. Venus verrucosa - The Warty Venus Clam. Ascaris lumbricoides - The Human Giant Roundworm. Caenorhabditis elegans - A Model Species of Roundworm. Heterodera glycines - The Soybean Cyst Nematode. Circulate to the Worksheet Page! Blood without oxygen appear blue.

What is color blindness? What is color blindness? What goes wrong and why does it happen? How do people with color blindness treat it? What are the symptoms of color blindness? This may vary with the severity of the persons condition. Very minor patients are not even aware that they see color differently from people with normal color vision. Severe color blindnss can only distinguish a few colors and probably is aware of there difference in sight. What are the limitations of people with color blindness? .

Welcome to the Cri Du Chat Homepage. The purpose of this website is to present information about the genetic disorder,. Cri Du Chat, from its history and background to the genetic reasons to why it occurs. Hopefully, I can answer all your questions through my research and presentations.