has part has part has_part characteristic of part of has modifier abnormal seminal vesicle morphology abnormal seminal vesicle muscle layer morphology any structural anomaly of the thick muscular layer of the seminal vesicle consisting of an inner circular and outer longitudinal layer of smooth muscle which contracts during the emission phase of ejaculation to expel seminal vesicle fluid into the prostatic urethra abnormal muscular coat of seminal gland morphology abnormal muscular layer of seminal gland morphology MP:0013904 abnormal seminal vesicle muscular coat morphology morphology abnormal muscular coat of seminal vesicle