Table 1 Location of nitric oxide/nitric oxide synthase in the male reproductive system

Seminal Ejaculate

[21, 22]

Mature and immature spermatozoa

Accessory glands

[24–28]

Coagulating gland, urethra, penis, neck of bladder, prostate, seminal vesicles

Epididymis

[27, 29]

Caput, corpus, cauda

Penis

[26, 30]

Corpus cavernous

Pelvic plexus

Cavernous nerves and their terminal endings within the corporeal erectile tissue

Branches of the dorsal penile nerves, nerve plexuses in the adventitia of the deep cavernous arteries

Testes

[20, 24, 25, 27, 29, 31]

Leydig Cells in adolescent males

Round cells from different stages of spermatogenesis

Infiltrating leukocytes, specifically neutrophils in conditions such as leukocytospermia

Epithelial cells

Endothelial cells

Smooth muscle cells

Macrophages in the intertubular area of the seminiferous tubules

Ducts

[24–27, 29]

1. Ejaculatory duct

2. Vas Deferens