14 Apr 2012. Home INR monitors are simple to use and provide accurate results. You don't need any medical experience or technology skills to perform the simple INR test. The listed monitors are all approved for professional and home use allowing you immediate INR test values resulting in improved care.
Lampreys and hagfishes are the only jawless vertebrates to survive today. They both have a round mouth and for this reason are often referred to as cyclostomes. They are the most primitive of the vertebrates. By primitive, a biologist means that they are the least changed from the first vertebrates.1  They have no paired pectoral (shoulder) or pelvic (hip) fins. 2  Their notochord persists for life, never being completely replaced by a backbone even in the lampreys.3  They have no scales.y primitive, a biologist means that they are the least changed from the first vertebrates. 1  They have no paired pectoral (shoulder) or pelvic (hip) fins. 2  Their notochord persists for life, never being completely replaced by a backbone even in the lampreys. 3  They have no scales.
The primitive streak originates from the anterior epiblast, and appears as an elongating groove (primitive groove) on the dorsal midsagittal surface of the epiblast, along the anterior-posterior axis of the embryo. The rostro-caudal and medial-lateral axes of the embryo are defined by the primitive streak.The rounded primitive node, or Hensen's node, is situated at the cranial tip of the primitive streak, and contains a depression called the primitive pit.mbryonic Derivatives of the Primitive Streak: Cells from the epiblast migrate into the interior of the embryo via the primitive streak, in a process termed ingression, which involves a cellular epithelial-to-mesenchymal transition (EMT).