System whose function is production of semen and its introduction into the female genital tract; external organ is a penis (rudimentary in Galliformes); internal organs include testes, rudimentary epididymides and ductus deferentes.
Male genital organs, male reproductive organs, male sex
Definition
Related terms
Maintenance requirement
The amount of nutrients required to keep an animal in nutrient balance.
Male’s genital eminence
A symmetrically rounded prominence of the cloacal mucosa located between two dis...
Malposition of embryos
Embryo positions before hatching that differ from the normal longitudinal positi...
Mammillary layer of the shell
Shell layer adjoining the outer shell membranes, formed by conical structures; f...
Marek´s disease
Contagious viral disease manifested clinically by paralysis, changes in pupil sh...
Mating-ratio
Number of hens per one male in a breeding flock.
