Reproduction 2
Postnatal development
after birth, differentiation and growth continue to adult stage.
Progesterone
causes the lining of the uterus to thicken, and an increase in blood vessels to form.
Implantation
cleavage of fertilized egg begins at once in the oviduct 6-10 days later, the embryo (blastula) implants in the uterine lining.
Fallopian tubes
close to each ovary is the funnel shaped opening of a Fallopian tube, or an oviduct The egg, released from the ovary, enters the Fallopian tubes and is transported through the tube to the uterus.
Ovulation
egg is released from the follicle.
Ovation hormones
estrogen, progesterone
Gestation
9 months of baby in stomach
Corpus luteum stage
follicle becomes a mass of cells called corpus luteum, which secretes the hormone progesterone
Secretions
glands secrete various fluids, which are a transport medium for the sperm. This is an adaptation for life on land.
Uterus
hallow, oval organ in which development of the fertilized egg occurs.
Puberty
hormones control the development of the reproductive tissues. Sperm and egg production
Menstruation
if an egg has not been fertilized, lining of uterus breaks down and passes out of uterus, as blood flow for about four days.
Multiple embryos
if the ovary releases 2 eggs, and each is fertilized by different sperms, fraternal twins result.
Prenatal development
Gastrulation occurs after implantation in the uterine wall Placenta and umbilical cord and amniotic fluid develop
Semen
mixture of fluids and sperm
Death
natural aging process ends, irreversible cessation of all brain functions
Aging
normal development of the Individual: we now know that much can be done to improve natural changes of mental and physical aging.
Identical twins
one egg is released, and is released, and is fertilized by one sperm, but the cells separate during early cleavage
Hormones
ovaries produce female sex hormones that regulate the development of female secondary sex characteristics, such as mammary glands, and broadening of the pelvis. The ovarian hormones and the pituitary hormone regulate the menstrual cycle.
Follicle stage
ovaries secrete the hormone estrogen and an egg matures in an ovarian follicle
Ovaries
pair of female gonads Produce the female gametes, called eggs Eggs are produced by meiosis in cavities called follicles
Ducts
passageway for sperm from testes to the urethra in the penis, which is an adaptation for depositing sperm into the body of the female
In-vitro
technique in which an egg and sperm fertilize outside the body and then the embryo is implanted into the uterus of the female, where normal development and birth occur.
Male hormones
testes produce testosterone, which regulates the development of the male secondary sex characteristics such as beard development and deep voice.
Fertilization
the fusion of a male gamete (sperm) with a female gamete (egg) usually occurs in the upper portion of an oviduct. If it doesn't occur within 24 hours, the egg degenerates
Birth
through the vagina 9 months after fertilization
Fertilization of egg
would occur in the Fallopian tube, or oviduct, if there is sperm present
Pituitary hormone
FSH, LH
Ovulation
Once a month an egg is released from a follicle. All of the eggs that a female will produce are present in an immature form at birth.
Female reproductive system
Ovaries, Fallopian tubes, vagina, uterus
Menstrual cycle
a series of changes changes in the ovary and the uterus that occur at approximately one month intervals Begins at puberty, Stops during pregnancy, Stops permanently at menopause. Average 28 days, but often varies each month of among individuals
Testes
located in the outdo king of the body wall called the scrotum Temperature is 1-2 degrees lower than the normal body temp. For production and storage of sperm
Vagina
lower end of the uterus connect to the vagina, or birth canal, a muscular tube leading to the outside of the body.
Hormone feedback cycle
maturation of an egg is stimulated by follicle stimulating hormone(FSH) secreted by pituitary
Menopause
menstrual cycle stops permanently at about 45-50, but age of onset may vary greatly.
