Because all eukaryotic cells have mitochondria but not all have chloroplasts, it is thought that the host cell first engulfed the respiration cell. Quite a while later, one of these cells that contained the respiration cell engulfed the photosynthesis cell.
What Is The AVH? Founded in 1995, the Academy of Veterinary Homeopathy is comprised of veterinarians who share the common desire to restore true health to their patients through the use of homeopathic treatment. Members of the Academy are dedicated to understanding and preserving the principles of Classical Homeopathy.
Avascular necrosis (AVN) of the femoral head is a pathologic process that results from interruption of blood supply to the bone. AVN of the hip is poorly understood, but this process is the final common pathway of traumatic or nontraumatic factors that compromise the already precarious circulation of the femoral head. Femoral head ischemia results in the death of marrow and osteocytes and usually results in the collapse of the necrotic segment. (See also the Medscape Reference article Imaging in Avascular Necrosis of the Femoral Head, as well as Hip Arthroscopy in Staging Avascular Necrosis of the Femoral Head on Medscape News.)