Examlex
Explain why checks on principals might be necessary.
Urethra
The duct through which urine is discharged from the bladder to the exterior of the body in both males and females, and also serves as a conduit for semen in males.
Micturition Reflex
Contraction of the urinary bladder stimulated by stretching of the bladder wall; results in emptying of the bladder.
Blood-testis Barrier
A physical barrier between the blood vessels and the seminiferous tubules of the testes, protecting germ cells from harmful substances in the bloodstream.
Antibodies
Proteins produced by the immune system that recognize and neutralize foreign substances, such as bacteria and viruses.
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