Pediatrics is also a three year residency program leading to Board Certification in Pediatrics. While there is no Med-Peds board, once a physician successfully completes a four year Med-Peds residency program they are eligible to complete the board certification exams in both Internal Medicine and Pediatrics.
Definition of bundle for English Language Learners. : 1  a group of things that are fastened, tied, or wrapped together. : 2  a group of things that are together or are associated with each other in some way. : 3  a person who has a lot of some quality or who is known for a particular kind of behavior.
A vascular bundle is a part of the transport system in vascular plants. The transport itself happens in vascular tissue, which exists in two forms: xylem and phloem. Both these tissues are present in a vascular bundle, which in addition will include supporting and protective tissues. The xylem typically lies adaxial with phloem positioned abaxial. In a stem or root this means that the xylem is closer to the centre of the stem or root while the phloem is closer to the exterior. In a leaf, the adaxial surface of the leaf will usually be the upper side, with the abaxial surface the lower side.