Animal Science/Dairy Science 434 Reproductive Physiology Lecture 1: Female Anatomy Updated:2/19/2019

Female Reproductive Tract Anatomy Lecture 1 Female Reproductive Tract Anatomy Updated:2/19/2019

Learning Objectives To be able to describe the female reproductive system in cattle. Structure Function Updated:2/19/2019

Equine - Horse Male Stallion Female Mare Updated:2/19/2019

Bovine - Cattle Male Bull Female Cow Updated:2/19/2019

Ovine - Sheep Male Ram Female Ewe Updated:2/19/2019

Porcine - Swine - Pig Male Boar Female Sow Updated:2/19/2019

Avian - Chicken Male Rooster Female Hen Updated:2/19/2019

Uterine Body Uterine Horn Ovary Oviduct Cervix Bladder Vagina Urethra Clitoris Vulva Updated:2/19/2019

Rectum Uterus Vulva Ovary Vagina Pelvis Bladder Cervix Oviduct Broad Ligament Updated:2/19/2019

Broad Ligament connective tissue sheet which supports and suspends the reproductive tract Updated:2/19/2019

Broad Ligament mesometrium mesovarium mesosalpinx Updated:2/19/2019

Ovary - Primary Sex Organ Functions Hormonal Estrogen Progesterone Female gamete Oocyte Updated:2/19/2019

Ovary Follicle - Estrogen, Oocyte Corpus Luteum Corpus Luteum Progesterone Updated:2/19/2019

} Ovary Germinal Epithelium Cortex Medulla Tunica Albuginea 85% of Ovarian Cancers Medulla Tunica Albuginea Blood and lymphatic Vessels & nerves Hilus } Updated:2/19/2019

Ruptured follicle (ovulation) Tertiary follicle Primary follicle Egg nest Tertiary follicle Atretic follicle Secondary follicle Corpus hemorrhagicum Corpus albicans Corpus luteum Updated:2/19/2019

Ruptured follicle (ovulation) Tertiary follicle Primary follicle Atretic follicle Secondary follicle Corpus hemorrhagicum Corpus albicans Corpus luteum Updated:2/19/2019

Ruptured follicle (ovulation) Tertiary follicle Primary follicle Atretic follicle Secondary follicle Corpus hemorrhagicum Corpus albicans Corpus luteum Updated:2/19/2019

Ruptured follicle (ovulation) Tertiary follicle Primary follicle Atretic follicle Secondary follicle Corpus hemorrhagicum Corpus albicans Corpus luteum Updated:2/19/2019

Primordial Follicle Primary Follicle Secondary follicle Tertiary follicle Flattened cells surround oocyte Follicle Cells Nucleus Increase in size of oocyte and height of follicular cells Ooplasma Follicular Cells Surrounded by several layers of follicular cells Oocyte Follicle forms a fluid filled cavity Differentiation of cell layers in the follicle wall Antrum

Tertiary Follicle Theca Externa Antrum Theca Interna (Follicular Fluid) Theca Interna Basement Membrane Oocyte Granulosa Cumulus Oophorus Updated:2/19/2019

Tertiary Follicle Theca Interna Granulosa Oocyte Cumulus Oophorus Antrum Updated:2/19/2019

Follicular Blood Supply Theca interna cells Basement Membrane Granulosa cells Capillary network Follicular fluid Updated:2/19/2019

Secondary Sex Organ: A Series of Tubes to Convey the Oocyte/Embryo/Fetus to the Outside Serosa Submucosa Longitudinal smooth muscle layer Lumen Circular smooth muscle layer Mucosa Muscularis Updated:2/19/2019

Functions of Oviduct Gamete Transport Sperm Oocyte Supports early embryo development Transport of embryo to uterus Updated:2/19/2019

Oviduct Ovary Uterine Horn Isthmus Utero-Tubal Junction Ampullary-Isthmic Junction Ampulla Infundibulum (20 - 30 cm2) Ostium Cumulus Oophorus and Oocyte Fimbria Ovary Follicle Updated:2/19/2019

Oviduct Ampulla Mesosalpinx Isthmus UT Junction Uterine Horn Updated:2/19/2019

Oviduct Histology Mucosa Ciliated Columnar Nonciliated Columnar Updated:2/19/2019

Functions of the Uterus Muscle contractions Transport sperm Expel fetus and placenta Absorption and phagocytosis Partially prepares sperm for fertilization capacitation Provides environment for embryo and fetal growth Hormone production Prostaglandin F2a production Updated:2/19/2019

Uterus (bovine) Bicornuate horn body poorly to moderately developed uterine horns uterine body one cervix cervix Updated:2/19/2019

Caruncles Updated:2/19/2019

Uterine Histology Endometrium Endometrial Glands Perimetrium Myometrium Updated:2/19/2019

Uterine Histology Mucosa Endometrial Gland Endometrium Myometrium Submucosa Myometrium Perimetrium Updated:2/19/2019

Functions of the Cervix Transport of sperm Barrier to sperm (species dependent) Reservoir for sperm Blocking bacterial invasion during pregnancy Birth canal Updated:2/19/2019

COW Cervix Cervix is composed of thick connective tissue Uterine Body Internal Cervical Os Cervix is composed of thick connective tissue Mucus is secreted near the time of breeding and ovulation. Cervix Cow has 4-5 annular rings External Cervical Os Vagina Updated:2/19/2019

Cervix COW Internal Os Cervical Ring Cervical Ring Fornix Fornix External Os EWE Fornix Anterior Vagina Anterior Vagina Updated:2/19/2019

Functions of the Vagina Copulatory organ Glands secrete lubrication Birth canal Glands secrete pheromones Updated:2/19/2019

Posterior Vagina (Vestibule) Anterior Vagina Posterior Vagina (Vestibule) Cervix Vulva-Vaginal Sphincter Fornix Stratified Squamous Epithelium Columnar Epithelium Urethra Mucosa Submucosa Submucosa Updated:2/19/2019

Posterior Vaginal Histology Stratified Squamous Epithelium Mucosa Submucosa Updated:2/19/2019

Function of External Genitalia Labia Closes entrance to vagina Clitoris Female sensory organ Updated:2/19/2019

External Genitalia of the Cow Anus Vulva Labia Clitoris Labia Updated:2/19/2019

Phenomena For Fertility vagina dentata - a vagina with teeth female bedbug - no vagina hysterectomy - if woman went to long without becoming pregnant then uterus would wonder in body causing hysteria and other distresses hyena - clitoris is very large and looks like the male penis; female also has a false scrotum (labia); female is the dominate sex and produces more testosterone than male Updated:2/19/2019

Ruptured follicle (ovulation) Tertiary follicle Primary follicle Egg nest Tertiary follicle Atretic follicle Secondary follicle Corpus hemorrhagicum Corpus albicans Corpus luteum Updated:2/19/2019