Anatomy and Physiology Of Reproduction Animal (Postpartum Uterus)

University:
Sam Houston State University
Course:
BIOL 2413 | General Zoology
Academic year:

2020
Views:

492

Pages:

8
Author:

AAlvarez

Postpartum Uterus Placentomes • 100 Distinct Button-Like Sites Attach the Fetal Membranes to Lining of the Uterus – Carancules are Located on the Uterine Lining – Cotyledons are Located on the Fetal Membrane • Each Carancule is Covered by a Cotyledon – Makes up a Structure Called the Placentome • At Calving Some Will Reach 3 by 5 by 2 Inches • For Normal Discharge of Fetal Membranes, Cotyledons and Carancules Must Promptly Separate Placentome Nutrient Exchange • Placentome – No Mixing of Blood, But Transfers Nutrient & Waste – Nutrients Dissolved in Cow’s Blood Pass Through Thin Membrane Into Calf’s Blood – Waste Products From Calf Transfer Through Same Membrane Into Cow’s Blood for Elimination – Mass of Tiny Blood Vessels • Separated by Thin Tissue Layers • Permit High Volume of Blood Flow • Enables Easy Exchange of Nutrients and Waste Recovery Delays • Considering Size and Function of Tissues – Takes Considerable Time to Return to Normal Condition • Return to Normal Condition Delays Include: – – – – – Calving Difficulties Uterine Diseases at Calving Retained Fetal Membranes Other Uterine Infections Some Diseases Within the Cow Summary • Cervix Can Be Manipulated Through the Rectal Wall • The Vagina Provides Passage to the Cervix • Cervix is Generally Located on the Front Edge of the Pelvic Floor • The Target for Depositing Semen is the Uterine Body • Uterus is Where Embryo Grows Into Calf Summary • Uterus Consists of Three Parts – Small Body and Two Horns • Extending From Uterine Horns are Fallopian Tubes • At end of Fallopian Tubes are Ovaries • Every 21 Days Ovaries Produce Egg • Egg Develops Within Graafian Follicle • As Follicle Grows it Secretes Estrogen Summary • 10 to 14 Hours After Heat Ends, Egg is Ovulated • Collapsed Follicle Grows Into Corpus Luteum • Corpus Luteum Produces Progesterone • Progesterone Stops Follicle and Egg Development • Gestation for a Calf is About 280 Days • A 45-Day Rest Between Breedings is Required for Reasonable Conception Rates