Lecture 17 - Reproduction (part 2)

• site of fertilization and early cell divisions of embryo • transport oocyte and sperm towards each other • muscular tissue with contractile properties

• infundibulum • ampulla • isthmus

Site of fertilization • delays transport of oocyte to increase chances of fertilization • cilia move embryo towards the utero-tubal junction (UTJ)

Organ of pregnancy • sperm transport • luteolysis and control of cyclisity • fetal attachment and development • maternal contribution to placenta • expulsion of fetus and placenta

Perimetrium Myometrium Endometrium

Located between the uterus and the vagina Passageway and reservoir for sperm Barrier to prevent bacteria from entering the uterus Passageway for fetus during parturition

Organ of copulation

External genitalia Visible swelling during estrus aids in heat detection Protection for vagina from outside environment

Offspring development does not occur within the body • eggs are fertilized then laid outside the body for continued development • eggs must be incubated naturally or artificially until development is complete

Occurs in the infundibulum if sperm are present • sperm can remain viable in infundibulum for 4-6 days • ovum spend 30 minutes in the infundibulum

Ovum moves here from infundibulum • spends 2-3 hours here • thick albumen (egg white) deposited around the yolk

Shell membranes are deposited around the albumen • 1.5 hours here • ovum takes water adn mineral salts

(Aka shell gland) • egg spends 18-20 hours here • more albumen added by diffusion • plumping - water and minerals diffusing in • calcification of the shell occurs • pigment is added

Cuticle added, seals pores present in the shell

Common oriface for copulation, defecation, egg expulsion