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33 terms

bio 39-3

STUDY
PLAY
Reproduction
formation of new individuals sexually or asexually; no gametes involved
Asexual reproduction
process where one parent reproduces by itself;
Sexual reproduction
two parents give rise to offspring that have a unique combination of genetic material;two gametes involved
Types of Asexual reproduction
Binary Fission, Budding, Spore formation
Binary Fission
a parent cell divides into two new daughter cells the same size as the parent with the same kind and quantity of DNA.
Binary fission organisms
protozoans, bacteria, and some algae
Budding
an outgrowth on a yeast cell grows and separates from the parent cell
hydra
reproduce by budding
Spore formation
a cell undergoes a series of cell divisions inside its own cell wall. Each new cell produces a thick wall of its own, and the old cell wall becomes a spore case holding small thick-walled cells, the spores. These grow into new individuals
Puberty
period of rapid growth and sexual maturation during which the reproductive system becomes fully functional. Secondary sex characteristics develop; LSH and FH levels are increased.
males secondary sex characteristics
growth of facial and body hair, increase in body size, and deepening of the voice
females secondary sex characteristics
development of the reproductive system, widening of the hips, and development of the breasts.
Gonads
produce gametes (sperm and eggs) and secrete sex hormones testis and ovary
male reproductive structures
testes, the epididymis, the vas deferens, the urethra, and the penis. they produce and deliver sperm.
testes
one to three degrees lower than the internal body temperature for proper sperm development
sperm
produced in the seminiferous tubules within the testes
spermatogenesis
process that results in sperm cell formation
sperm cells
male gametes; has a head, a middle piece, and a tail (flagellum)
epididymis
site where the sperm cells are stored and matured
seminal fluid
a nutrient-rich fluid
semen
combination of sperm and seminal fluid
ejaculation
contractions of the smooth muscles lining the glands in the reproductive tract causes sperm cells to be ejected from the penis
female reproductive structures
ovaries, the Fallopian tubes, the uterus, and the vagina. In addition to producing eggs,
female reproductive system
produces eggs; prepares the body to nourish a developing embryo
primary follicles
Clusters of cells surrounding a single egg
FSH
stimulates a follicle to grow and mature each month
path of the egg
Fallopian tubes to the uterus
four stages of the menstrual cycle
Follicular phase, Ovulation, Luteal phase, Menstruation
menstrual cycle
an egg develops and is released from an ovary, if the egg is not fertilized it is discharged along with the lining of the uterus
Follicular phase
follicle develops
Ovulation
mature egg is released from ovary into the oviduct
Luteal phase
egg travels through the Fallopian Tubes
Menstruation
lining of the uterus is shed and is discharged through the vagina (lasts on the average of 3-7 days)