الفهرس 
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Abstract
Kidneys from 35 of both sexes, 22 females and 13 males adult rabbits were used.
ANATOMICAL FINDINGS:
- The proper renal pelvis, which is a crescen¬tic cavity, emanates from the ureter without previous funnel-shaped portion of the terminal part of the ureter.
- Twelve folds on each surface of the kidney were thrown from the wall of the pelvis, and exten¬ded deep into the renal tissue.
- The two halves of the kidney, dorsal and ven¬tral were supplied by two separate branches arising from the renal artery. Each branch had the same course and distribution.
Light Microscopy:
- The renal capsule was formed of a distinct fibrous contained no smooth muscles.
- Groups of intertubular cells were apparent in the interstitial tissue.
- The renal corpuscle was more or less spherical in shape. No differences could be observed in the size of the cortical and juxtamedullary corpuscles. However, their number in the cor¬tical region was greater than in the juxtame¬dullary one.
- The proximal tubule was the largest part of the rabbit’s nephron and was formed of neck, convoluted and straight portions. The brush border was uniformely arranged along the apices of the tubular cells. The latter was clearly demonstrated with trichome stain.
- The distal tubule consisted of three segments; the straight segment; the macula densa and the convoluted one.
- With SEM The vis¬ceral layer bore little resemblance to the epithelial cells. Their special¬ized cells called podocytes. They were stellate in shape and possessed cytoplasmic extensions that originated from the nucleated portion of the cell body. Consecutive branching of the cytoplasm produced primary, secondary, and tertiary processes, which collectively enclosed and surrounded the entire glomerular capillary.
The cells tended to be distributed at irregular distances. Their cell surface was smooth and round. Some short and blunt microvilli were seen on it and protruded into the urinary space. Some five to seven processes were emerged from the peripheral margin of the cell body. The sizes of these primary processes were very variable. Most of them were long, wide and distributing secondary and tertiary processes and pedicels to a distance.