Figure 1. Forces acting on an aircraft during a level coordinated turn. Load factor is a very important structural design parameter of an aircraft, as it. indicates the amount of the load which the structure of an aircraft can bear. For. this reason, maximum load factor is a maneuvering and performance limit. The. limit load factor is the highest load factor to be expected over the lifetime of the. aircraft.
1 2. VASCULATURE OF SKIN â¢ Blood vessels of the skin are formed embyrologically by an intricate network of mesenchymal cells that come to surround arbonizing spaces. BLOOD VESSELS superficial plexus deep plexus venules ALL OF WHICH ARE CONNECTED BY COMMUNICATED BLOOD VESSELS 2. 2  3. â¢ Communicating vessels arise from and lead back to arteries and veins that lie within the septa of the subcutaneous fat.
(See also Overview of Vascular Bleeding Disorders.) Senile purpura causes ecchymoses and results from increased vessel fragility due to connective tissue damage to the dermis caused by chronic sun exposure, aging, and drugs. Purpura refers to purplish cutaneous or mucosal lesions caused by hemorrhage. Small lesions (< 2 mm) are termed petechiae, and large lesions are termed ecchymoses or bruises. Senile purpura typically affects elderly patients as their dermal tissues atrophy and blood vessels become more fragile. Patients develop persistent dark purple ecchymoses, which are characteristically confined to the extensor surfaces of the hands and forearms.