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Animal Science, Week 1 Notes

by: Brooke Stracener

Animal Science, Week 1 Notes ANSC 1613

Marketplace > Arkansas State University > Agriculture > ANSC 1613 > Animal Science Week 1 Notes
Brooke Stracener
GPA 4.0

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About this Document

These notes cover what is going to be on the quiz net week. Lecture Notes. Date of Notes: 9/29 Email me with any questions!
Intro to Animal Science
Dr. Newman and Dr. Kennedy
Class Notes
Science, agriculture, Newman, animals
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This 2 page Class Notes was uploaded by Brooke Stracener on Monday October 3, 2016. The Class Notes belongs to ANSC 1613 at Arkansas State University taught by Dr. Newman and Dr. Kennedy in Fall 2016. Since its upload, it has received 59 views. For similar materials see Intro to Animal Science in Agriculture at Arkansas State University.

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Date Created: 10/03/16
Introduction to Animal Science: Animal Reproduction Part 1 for Test 6 on 10/4  Parturition- the process of giving birth  Gonads- sex organs (produce reproductive cells) o Male-Testes o Female- Ovaries  Gametes- the reproductive cells o Male- Sperm o Female- Egg (ova)  Female Reproductive Responsibility: 1. Produce viable ovum and release it at the proper time 2. Successfully conceive 3. Provide for the fetus during pregnancy 4. Successfully deliver fetus 5. Accept and nourish the newborn  Reproductive Tract: o Ovary- Produce oocytes (egg cells), production of Estrogen (Graafian Follicle), production of Progesterone ( Corpus Luteum) o Oviduct- Transport ova and sperm, site of fertilization and early cleavage o Cervix- Facilitating sperm transport sow and mare, prevent uterine contamination o Uterus- Assist sperm transport, regulate Corpus Luteum, glandular secretions nourish embryo prior to placenta, site of implantation and pregnancy, expulsion of fetus and fetal membrane o Vagina- Copulation organ, birth canal  Follicles: o Blister-like structures o Contains ovum o Single follicle; cow and mare o Multiple follicles; sow  Corpus Luteum: o “yellow body” yellow mass of cells o Produces Progesterone  Corpus Albicans o “white body” o Degenerative process of Corpus Luteum o Scar  Formation of the Chicken Egg: o Infundibulum- receives yolk/ fertilization o Magnum- Albumin added (Egg White) o Isthmus- shell membranes added o Uterus- shell gland, thin albumin shell, and shell pigment o Cloaca- Egg rotates, common opening of reproductive and digestive tract  Puberty- transitional state through which animals progress from an immature reproductive and hormonal state to a mature state  Estrous- the cycle of ovulation in females o Development of mature follicles o Characteristic of reaching puberty o Length of Estrous is species dependent  Estrus- heat/ standing heat o Phase of sexual receptivity o Act of ovulation (expulsion of Estrogen (heat), Progesterone (maintains pregnancy), and Luteinizing Hormone (assists in the formation of the Corpus Luteum))  Length of Gestation (Pregnancy): o Cow: 274-291 days o Sow: 114 days (3 mo, 3 w, 3 day) o Ewe: 140-160 days o Mare: 336 days o Dogs: 58-68 days o Cats: 62-64 days  Male Reproductive Responsibilities: o Produce viable sperm in ample amounts o Willing and able to deliver sperm to the female tract or collection receptacle  Secondary Sex Characteristics- Characteristics that differentiate the sexes o Presented during and after puberty  Male Reproductive Tract: o Scrotum- Sack that holds the testicles o Testicle- Male sex organ which produce sperm o Epididymis- Concentrate, store, transport, and facilitate maturation of sperm o Vas Deferens- Tube that transports mature sperm o Accessory Gland- ampullae, seminal vesicles, prostate, and bulbourethral gland function to add volume and nutrition to semen o Penis- Male organ of copulation


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