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Chapter 46
Vocabulary required by my teacher for Chapters 46 in the Campbell Biology Book
53
Biology
11th Grade
02/27/2012

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Term
cervix
Definition
The neck of the uterus, which opens into the vagina.
Term
conception
Definition
The fertilization of the egg by a sperm cell in humans.
Term
corpus luteum
Definition
A secreting tissue in the ovary that forms from the collapsed follicle after ovulation and produces progesterone.
Term
embryo
Definition
New developing individual.
Term
endometrium
Definition
The inner lining of the uterus, which is richly supplied with blood vessels.
Term
epididymis
Definition
A coiled tubule located adjacent to the testes where sperm are stored.
Term
estrous cycle
Definition
A type of reproductive cycle in all female mammals except higher primates, in which the nonpregnant endometrium is reabsorbed rather than shed, and sexual response occurs only during mid-cycle at estrus.
Term
external fertilization
Definition
The fusion of gametes that parents have discharged into the environment.
Term
fetus
Definition
A developing human from the ninth week of gestation until birth; has all the major structures of an adult.
Term
estrus
Definition
A period of sexual activity associated with ovulation.
Term
follicle
Definition
A microscopic structure in the ovary that contains the developing ovum and secretes estrogens.
Term
follicular phase
Definition
That part of the ovarian cycle during which follicles are growing and oocytes maturing.
Term
gametogenesis
Definition
The process by which gametes are produced in the mammalian body.
Term
gestation
Definition
Pregnancy; the state of carrying developing young within the female reproductive tract.
Term
gonads
Definition
The male and female sex organs; the gamete-producing organs in most animals.
Term
hermaphroditism
Definition
A condition in which an individual has both female and male gonads and functions as both a male and female in sexual reproduction by producing both sperm and eggs.
Term
human chorionic gonadotropin (HCG)
Definition
A hormone secreted by the chorion that maintains the corpus luteum of the ovary during the first three months of pregnancy.
Term
in vitro fertilization
Definition
Fertilization of ova in laboratory containers followed by artificial implantation of the early embryo in the mother’s uterus.
Term
internal fertilization
Definition
Reproduction in which sperm are typically deposited in or near the female reproductive tract and fertilization occurs within the tract.
Term
labor
Definition
A series of strong, rhythmic contractions of the uterus that expel a baby out of the uterus and vagina during childbirth.
Term
lactation
Definition
The continued production of milk.
Term
luteal phase
Definition
That portion of the ovarian cycle during which endocrine cells of the corpus luteum secrete female hormones.
Term
mammary glands
Definition
Exocrine glands that secrete milk to nourish the young. These glands are characteristic of mammals.
Term
menopause
Definition
The cessation of ovulation and menstruation.
Term
menstrual cycle
Definition
A type of reproductive cycle in higher female primates, in which the nonpregnant endometrium is shed as a bloody discharge through the cervix into the vagina.
Term
menstrual flow phase
Definition
That portion of the uterine (menstrual) cycle when menstrual bleeding occurs.
Term
oogenesis
Definition
The process in the ovary that results in the production of female gametes.
Term
oogonia
Definition
Ovary-specific stem cells.
Term
ovarian cycle
Definition
The cyclic recurrence of the follicular phase, ovulation, and the luteal phase in the mammalian ovary, regulated by hormones.
Term
ovary
Definition
In animals, the structure that produces female gametes and reproductive hormones.
Term
oviduct
Definition
A tube passing from the ovary to the vagina in invertebrates or to the uterus in vertebrates.
Term
ovulation
Definition
The release of an egg from ovaries. In humans, an ovarian follicle releases an egg during each uterine (menstrual) cycle.
Term
ovum
Definition
The female gamete; the haploid, unfertilized egg, which is usually a relatively large, nonmotile cell.
Term
parthenogenesis
Definition
A type of reproduction in which females produce offspring from unfertilized eggs.
Term
placenta
Definition
A structure in the pregnant uterus for nourishing a viviparous fetus with the mother’s blood supply; formed from the uterine lining and embryonic membranes.
Term
primary oocyte
Definition
A diploid cell, in prophase I of meiosis, that can be hormonally triggered to develop into an ovum.
Term
proliferative phase
Definition
That portion of the uterine (menstrual) cycle when the endometrium regenerates and thickens.
Term
prostate gland
Definition
A gland in human males that secretes an acid-neutralizing component of semen.
Term
secondary oocyte
Definition
A haploid cell resulting from meiosis I in oogenesis, which will become an ovum after meiosis II.
Term
secretory phase
Definition
That portion of the uterine (menstrual) cycle when the endometrium continues to thicken, becomes more vascularized, and develops glands that secrete a fluid rich in glycogen.
Term
semen
Definition
The fluid that is ejaculated by the male during orgasm; contains sperm and secretions from several glands of the male reproductive tract.
Term
seminal vesicle
Definition
A gland in males that secretes a fluid component of semen that lubricates and nourishes sperm.
Term
seminiferous tubule
Definition
A highly coiled tube in the testis in which sperm are produced.
Term
sequential hermaphroditism
Definition
A reproductive pattern in which an individual reverses its sex during its lifetime.
Term
spermatheca
Definition
A sac in the female reproductive system where sperm are stored.
Term
spermatogenesis
Definition
The continuous and prolific production of mature sperm cells in the testis.
Term
spermatogonia
Definition
Stem cells that give rise to sperm.
Term
spermatozoon
Definition
The male gamete.
Term
testis
Definition
The male reproductive organ, or gonad, in which sperm and reproductive hormones are produced.
Term
uterus
Definition
A female organ where eggs are fertilized and/or development of the young occurs.
Term
urethra
Definition
A tube that releases urine from the body near the vagina in females and through the penis in males; also serves in males as the exit tube for the reproductive system.
Term
vagina
Definition
Part of the female reproductive system between the uterus and the outside opening; the birth canal in mammals; also accommodates the male’s penis and receives sperm during copulation.
Term
vas deferens
Definition
The tube in the male reproductive system in which sperm travel from the epididymis to the urethra.
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