a basic planner better to be opened in a laptop تكدرون تثبتوه ك bookmark وبي ذاكرة بداخله يتذكر الانجاز والالتزام بالخطة

The pressure within the left renal vein is often higher than on the right due to compression between the aorta and the superior mesenteric artery ("nutcracker effect").  Pressure in the left renal vein can also be elevated due to compression from a left-sided abdominal or retroperitoneal mass.  Persistently elevated pressure in the left renal vein can cause flank or abdominal pain, along with gross or microscopic hematuria (left renal vein entrapment syndrome).  Increased pressure in the left gonadal vein results in valve leaflet failure and varices of the testicular pampiniform plexus (varicocele).

The most common infectious cause of blindness worldwide is Chlamydia trachomatis. Repeated infection with C. trachomatis serotypes A–C leads to conjunctival scarring and blindness.