process in which genetic material from two parents combines and produces offspring that differ genetically from either parent
diploid cell formed when the nucleus of a haploid sperm cell fuses with the nucleus of a haploid egg cell
reproduction that does not involve the union of gametes and in which a single parent produces offspring that are genetically identical to the parent
form of asexual reproduction in which an organism splits into two, and each half grows new parts to become a complete organism
asexual reproduction in which a part of the parent organism pinches off and forms a new organism
process in sexual reproduction in which male and female reproductive cells join to form a new cell
the process by which the female lays eggs and the male fertilizes them once they are outside of the female
the process by which the male places the sperm inside the females's body, where the eggs are fertilized
A common opening for the digestive, urinary, and reproductive tracts found in many nonmammalian vertebrates but in few mammals.
ovarian structure that forms from a follicle after ovulation; secretes progesterone and estrogen
in the human female reproductive system, a canal that leads from the uterus to the outside of the body
two large folds of fatty tissue that are covered with hair on their outer surfaces; they enclose and protect the vagina
specialized coils of tiny tubules responsible for production of sperm, located in the testes
A cell that produces testosterone and other androgens and is located between the seminiferous tubules of the testes.
a part of the seminal duct formed by the duct from the seminal vesicle and the vas deferens
tube that carries urine from the bladder and releases it from the body; in males, tube through which semen is released from the body
produce about 60% of seminal fluid, these are located at the posterior wall of the urinary bladder close to the terminus of the ductus deferens. They produce a substance that nourishes the sperm passing through the tract or that promote the fertilizing capabiltiy of sperm in some way
secretes products directly into urethra through small ducts. contains anticoagulant enzymes and citrate.
the female reproductive cycle, characterized by a monthly change of the lining of the uterus and the discharge of blood
phase of the menstrual cycle characterized by the formation of the corpus luteum following ovulation
Phase of reproductive cycle during which the uterine wall begins to thicken, The second phase of the uterine (endometrial) cycle, during which the endometrium (shed off during menstration is rebuilt). This phase of the cycle is under the control of estrogen, secreted from the follicle developing in the ovary during this time period. The proliferative phase typically lasts from day 6 to day 14 of the menstrual cycle.
The third phase of the uterin (endometrial) cycle, during which the rebuilt endometrium is enhanced with glycogen and lipid stores. The secretory phase is primarily under the controll of progestone and estrogen (secreted from the copus luteum during this time period), adn typically lasts from day 15 to day 28 of the menstrual cycle.
the time of natural cessation of menstruation; also refers to the biological changes a woman experiences as her ability to reproduce declines.
A reproductive cycle characteristic of 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.
In the sexual response cycle, engorgement of the blood vessels, particularly in the genital area, due to increased blood flow
A fluid-filled sphere formed about 5 days after fertilization of an ovum that is made up of an outer ring of cells and inner cell mass. THis is the structure that implants in the endometrium of the uterus.
the vascular structure in the uterus of most mammals providing oxygen and nutrients for and transferring wastes from the developing fetus
process of organ formation that takes place during the first two months of prenatal development