the male reproductive system remember from genetics?... sperm (gamete) + egg (gamete) zygote...
TRANSCRIPT
The Male Reproductive System
REMEMBER from Genetics?...
sperm (gamete) + egg (gamete) zygote
testosterone - male sex hormone produced by the interstitial cells of the testes.
Testosterone stimulates spermatogenesis
spermatogenesis - process by which spermatogonia divide and differentiate into mature sperm cells (meiosis)
gonatotropic hormones - hormones produced by the pituitary gland that regulate the functions of the testesin males and the ovaries in females.
• LH luteinizing hormone• FSH follicle stimulating hormone
fertilization
The Male Reproductive System
The Male Reproductive System
The Male Reproductive System
Gonadotropic hormones: Made by pituitary gland
follicle-stimulating hormone (FSH) - in males, hormone that increases sperm production.
luteinizing hormone (LH) - in males, hormone that regulates the production of testosterone.
gonadotropin-releasing hormone (GnRH) - chemical messenger from the hypothalamus that stimulates secretions of FSH and LH from the pituitary.
The Male Reproductive System
LH stimulates interstitial Cells to produce Testosterone.
Testosterone increases Sperm production
High levels of testosterone Detected by hypothalamus, Negative feedbackInhibits LH production by Stopping release of GnRH
Inhibin produced by Sertoli cells, Feeds back to pituitary and Hypothalamus (not well understood)
The Female Reproductive System
Ovaries produce progesteroneAnd estrogen
The Female Reproductive System
The Female Reproductive System
follicles - structures in the ovary that contain the egg and secrete estrogen
• Primary oocyte matures into ovum (egg)• Granulosa cells provide nutrients for oocyte
ovulation - release of the egg from the follicle held within the ovary.
corpus luteum - a mass of follicle cells that forms within the ovary after ovulation; secretes estrogen and progesterone.
The Female Reproductive System
Ovarian hormones:
estrogen - female sex hormone that activates the development of female secondary sex characteristics, including development of the breasts and body hair, and increased thickening of the endometrium (lining of uterus).
progesterone - female sex hormone produced by the ovaries that maintains uterine lining during pregnancy.
The Female Reproductive System
The Female Reproductive System
Estrogen secreted, increases Lining of endometrium
The Female Reproductive System
Gonadotropic Hormones:
follicle-stimulating hormone (FSH) - in females, a gonadotropin that promotes the development of the follicles in the ovary.
luteinizing hormone (LH) - in females, a gonadotropin that promotes ovulation and the formation of the corpus luteum.
