development of an egg without fertilization, virgin birth eg stick ant
tubes in the testes that manufacture sperm
location of sperm storage prior to ejaculation
The thick, muscular, pear-shaped organ in the female mammal in which the embryo develops.
growth of several follicles in the ovaries that secrete increasing amount of estrogen in response to FSH
The process by which a mature egg is released from the ovaries into the fallopian tubes.
increase in progesterone from corpus luteum and estrogen from ovaries cause endometrium to thicken preparing for implantation
Process in which the thickend lining of the uterus breaks down and blood and tissue exit the female body through the vagina.
mitotic cell division of a zygote or early embryo
Process of cell migration during which the primary germ layers are formed in the embryo.
the embryo in the stage of development after the blastula; contains the embryonic germ layers
the outer germ layer that develops into skin and nervous tissue
the middle germ layer that develops into muscle and bone and cartilage and blood and connective tissue
the inner germ layer that develops into the lining of the digestive and respiratory systems
A solid ball of cells that makes up an embryo; in humans, this stage occurs within four days of fertilization.
the hollow ball of cells marking the end stage of cleavage during early embroyonic development
where embryonic stem cells are
Process in which cells become specialized in structure and function.
an increase in size and/or cells
cells that remain able to differentiate into various other types of cells
adult stem cells
stem cells located in tissues that help maintain and regenerate those tissues , give rise to "like" cells
embryonic stem cells
can become potentially any type of cells, (Cell in the early animal embryo that differentiates during development to give rise to all the different kinds of specialized cells in the body)
aquatic external development
eggs of many fish and amphibians are fertilized and develop externally in an aquatic environment
terrestrial external development
eggs of birds, reptiles, and some animals develop externally after being fertilized internally
the food source for all external developing babies and marsupials
internal placental development
occurs in human and whales; after internal fertilization the embryo develops internally in a uterus
the food source for developing embryo in placental mammals; combination of internal and embryonic tissues; exchange by diffusion
contains blood vessels; connects baby to placenta
internal marsupial development
internal fertilization and development occur without nourishment from the mother; embryo migrates and development is completed externally in a pouch containing mammary glands
surrounds the embryo and contains blood vessels
respiratory surface, also the storage site for nitrogenous waste, uric acid
outer membrane surrounding the other embryonic membranes
protein reserve/egg white
keep testes at a temperature one to two degrees below body thus increasing sperm production
produce sperm and testosterone
Tube that carries sperm from the epididymis to the urethra.
function of Cowper's gland, seminal vessicles, and prostate gland
add fluid and nutrients to sperm to form semen
the male organ that transfers sperm to a female and that carries urine out of the body.
one of usually two organs that produce ova and secrete estrogen and progesterone
tubes which carry eggs from the ovaries to the uterus and where fertilization occurs
"tubes tied" this blocks egg from sperm; female version of a vasectomy
opening to uterus; dilates during labor
diagnostic test for cervical cancer
carries sperm and urine out of body (not at same time)
The structure leading from the uterus to the outside of the body in mammalian females; the birth canal.
The hormone-controlled cycle in the human female, lasting about a month, in which an egg matures and is released from the ovary and the uterus prepares to receive it.
Two individuals formed when two eggs are fertilized at the same time; twins that are genetically different.
Two individuals formed when one fertilized egg divides at an early stage of development, producing two organisms with the same gentic makeup.
outside of the body; implanted for development
the period during which an embryo develops (about 266 days in humans)
HUMAN CHORIONIC GONADOTROPIN--hormone produced by placenta. This is what is tested for in urine pregnancy tests since the only time it is present is during pregnancy.
developing baby weeks 0 to 8
developing baby weeks 8 to birth
development before birth
development after birth
The slow, rhythmic contractions of the uterine muscles during childbirth caused by oxytocin
surgical removal of the baby
irreversible cessation of life signaled by lack of brain activity
Conjoined twins created when developing embryo starts to split into identical twins within the first 2 weeks after conception but split stops before completion.
stimulates contractions of uterus, milk ejections, labor; stops postpartum bleeding
Found in the anterior pituitary lobe; promotes the development of glandular tissue in the breast and stimulates the produciton of milk
stages of birth
dilation- opening of the cervix
Passage of the baby through the birth canal
Afterbirth- passage of the placenta
modified sweat glands in female mammals, which produce and secrete milk to feed their young
thin yellowish fluid that is high in protein, beginning secretions from the breast, before breast milk actually comes in, high in antibodies
what farmers call colostrum in cattle
Blastocyst implants too close to the cervix
implantation of the fertilized egg outside the uterine cavity, often in the Fallopian tube or ovary, or rarely in the abdominal cavity X2 as common in smokers as nicotine reduces cilia activity
connects the embryo to the placenta; moves food and oxygen from the placenta to the embryo and removes the embryo's waste products
a drug of chemical agent that causes abortion, anything that destroys the fertilized ovum before it is implanted or renders the uterus incapable of receiving and or sustaining new life
a way of avoiding pregnancy, using either artificial methods such as condoms and birth control pills or natural methods such as avoiding sexual intercourse during a woman's fertile periods