ADSC 2010 Lecture 24 Outline of Last Lecture I Gonads Continued A Estrogen B Progesterone C Relaxin II Uterus A Prostaglandin III Thyroid Gland A Triodothyronine and Thyroxin IV Adrenal Gland A Glucocorticoids B Mineralocorticoids C Adrenaline Noradrenaline V Pancreas A Insulin and Glucagon VI The Estrous Cycle in Cattle VII Chart REPRODUCTION MALE ANATOMY VIII Testes A Sperm production B Androgen production IX Scrotum Outline of Current Lecture I Epididymis II Vas Deferens or Ductus Deferens III Urethra IV Accessory Sex Glands A Seminal Vesicle B Prostate Gland C Bulbourethral or Cowper s gland V Penis FEMALE ANATOMY VI VII Ovary Oviduct or Fallopian Tube Current Lecture I Epididymis Maturation Storage and concentration of sperm cells A Capot epididymis head fluid absorption occurs B Corpus epididymis body C Caudal epididymis tail sperm area concentrated and stored II Vas Deferens or Ductus Deferens Transport of sperm from caudal epididymis to urethra Ampulla absent in boar slow boar ejaculation 5 8 minutes enlarged portion of vas near urethra accumulation of sperm prior to ejaculation III Urethra Large muscular canal from bladder through penis Seminal vesicle and prostate glands empty into the urethra near the junction of the bladder IV Accessory Sex Glands A Seminal Vesicle secretes fluid citric acid fructose sorbitol into urethra for the sperm much larger in boar than other species Boar produces most ejaculate o More ova in sow needing fertilization than other species B Prostate Gland secretes fluid containing buffers and minerals Small in the bull absent in the ram C Bulbourethral or Cowper s gland large in boar Empties into urethra away from bladder Secretes the gel fraction to semen that helps seal the cervix V Penis copulatory organ ejaculation of seminal fluid expulsion of urine Bull ram and boar have fibroelastic penis o S shaped sigmoid flexure when released folds o Retractor penis muscles reform s shape following copulation Stallion erection through enlargement with blood NO sigmoid flexure VI Ovary two main function 1 Ova production 2 Estrogen and progesterone production Mature follicle end of cycle estrogen Corpus Luteum CL progesterone VII Oviduct or Fallopian Tube transports the ova and sperm site of fertilization A Fimbriae fringe like end that covers or partially covers ovary thin membrane B Infundibulum funnel shaped structure that connects to the ampulla C Ampulla fertilization occurs near ampulla isthmus junction
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