AnimalDairy Science 434 Lec 2 Female comparative anatomy
- Slides: 39
Animal/Dairy Science 434 Lec 2: Female comparative anatomy; History of Reproductive Physiology
Ovarian Differences Mare Cow Sow
Cow Cow, Sow, Ewe, Human • Cortex on outside • Ovulation can occur on any point of the ovary Mare • Inversion of the cortex and medulla. • Ovulation occurs at the Ovulation Fossa Preovulatory Tertiary Follicle Internal CL Mare Sow Blood vessels and connective tissue in medulla
Mare Cow
Uterine and Cervical Differences Cow Mare Sow
Duplex Rabbit, Mouse Oposum 2 Uterine Horns 2 Cervixes 2 Vaginas 1 Vagina
Bicornuate Cow Sow Ewe Smaller uterine horns 1 1 1 2 Vagina Cervix Uterine Body Uterine Horns Large uterine horns
Bicornuate Mare Large uterine body Smaller uterine horns 1 1 1 2 Vagina Cervix Uterine Body Uterine Horns
Bicornuate Dog Cat 1 1 1 2 Vagina Cervix Uterine Body Uterine Horns Small uterine body Long uterine horns
Simplex Woman Large uterine body No uterine horns 1 Vagina 1 Cervix 1 Uterine Body
Human Tract
Human Tract
A 47 -year old woman underwent a hysterectomy for excessively heavy menses. She had previously had four normal deliveries. This structure was removed, what is wrong?
Uterine Body COW 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
Mare Sow Uterine Body Longitudinal Folds No obstacles Interdigitating pads No fornix vagina Fornix Vagina
Cervix COW Internal Os Cervical Ring Fornix External Os EWE Anterior Vagina Fornix Anterior Vagina
Cervix Cervical Folds FV IP Sow Mare
External Genitalia Mare Cow Sow Ewe
What is this?
Human Tract
External Genitalia
Vagina Anterior Vagina Posterior Vagina (Vestibule) Cervix Vulva. Vaginal Sphincter (Hymen) Fornix Columnar Epithelium Urethra Stratified Squamous Epithelium Mucosa Submucosa
Infundibulum perivitelline membrane Ovary Avian Female Anatomy chalazae albumen Magnum Oviduct shell membrane Isthmus Shell Gland Uterus Intestine cleaving blastodisc 24 hrs 50 K cells vagina cloaca Right Oviduct Left side of Reproductive Tract Develops!! shell
Chicken Tract Ovary Magnum Intestine Shell Gland
Chicken Ovary Hierarchal Follicles
Ovary with large follicles removed Ruptured follicle
Chicken Reproductive Tract Isthmus Infundibulum Magnum Shell Gland Cloaca Follicles
Infundibulum
Cloaca Vaginal opening Intestine opening
Cloaca of Chicken Intestine opening Vagina opening
Historical Development of Reproductive Physiology Aristotle 384 -322 BC • Fetus arises from menstrual blood Generation of Animals • Seminal plasma initiates the conversion of menstrual blood • Semen from all parts of body
The Age of Gross Anatomy • Fallopius (1562) – Describes the oviduct • Coiter (1573) – Describes the corpus luteum • Regnier de Graff (1672) – Describes the antral follicle (Graafian Follicle)
Development of the Microscope • van Leewenhoek (1677) – Describes spermatozoa in semen
What is the role of spermatozoa? • Spallanzani (1780) – Sperm were the fertilizing agent in semen – Successful artificial insemination of a dog • Dumas (1825) – Proves sperm the fertilizing agent
Modern Reprod. Physiology • • • Gonads produce steroid hormones Regulation of estrous cycles in females Radioimmunoassay (RIA) Artificial Insemination Cryopreservation Prostaglandin used to control estrous cycles • Biotechnology
Approach to Applications • Develop basic knowledge of how system works • Investigate methods that can perturb the system • Manipulate the system to improve reproduction – Estrus Synchronization
Enhancing Reproduction • Small improvements have profound effects on production – 3% improvement in birth rate results in an additional: • 1 million beef calves/year • 3. 2 million pigs/year • 3. 7 million gallons of milk/year
Current Trends Metabolic and Production Physiologic Changes Reproduction • Continuing need to: – improve reproductive performance – understand how to apply new technology • Ovsynch • Clonning
Limiting Reproduction Insects Humans Wildlife Pets
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