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human repro. and dev
study vocabulary associated with reproduction and development
| Question | Answer |
|---|---|
| male gonads; produces sperm and testosterone | testes |
| sac that keeps the testes lower than body temperature | scrotum |
| coiled tubes that make up each testis and is the location of spermatogenesis | seminiferous tubules |
| location of sperm storage on top of each testis | epididymus |
| delivers sperm from each testis; connects to the urethra | vas deferens |
| purpose of glandular tissues of the male reproductive system | nourish and protect the sperm (supplies sugar for energy and is alkaline to protect against female reproductive tract) |
| female gonads; produces eggs, estrogen, and progesterone | ovaries |
| sac in which immature eggs are held | follicle |
| draws in the egg from the ovary; location of fertilization | oviduct |
| organ responsible for supporting the development of a fetus; location of differentiation | uterus |
| narrow neck of the uterus | cervix |
| series of events and feedback mechanisms that mature and develop and egg every 28 days and prepares the uterus for the development of an embryo | menstrual cycle |
| hormones of the menstrual cycle given off by the pituitary of the brain | FSH and LH |
| hormones of the menstrual cycle produced by the ovaries | estrogen and progesterone |
| stage of the menstrual cycle in which FSH matures an egg; estrogen increases the thickness of the uterine lining | follicle stage |
| the release of the egg; caused by LH | ovulation |
| stage of the menstrual cycle in which yellow cells in the ovary give off progesterone to maintain the uterine lining | corpus lutem stage |
| the passing of the unfertilized egg and uterine lining | menstruation |
| the fusion of the haploid sperm cell nucleus with the haploid egg cell nucleus | fertilization |
| a single cell formed after fertilization | zygote |
| name given to organisms in early stages of development; most critical since vital organ systems are forming | embryo |
| name give to an organism in the later stages of development | fetus |
| period during which the baby develops; in humans 9 months | pregnancy |
| fastening of the embryo to the uterus | implantation |
| temporary organ that allows the diffusion of materials between the baby's blood and the mother's blood | placenta |
| rope-like tissue that connects the placenta to the baby; contains blood vessels | umbilical cord |
| fluid-filled membrane that protects the developing baby | amnion |
| birth of a baby before it is ready; earlier than 40 weeks | premature |
| quick removal of the baby; incision made in the abdomen of the mother | cesarian section |
| twins that result when two eggs are ovulated and fertilized; may be of different gender; do not necessarily look alike | fraternal |
| twins that result when a fertilized egg/embryo splits during early stage of development; same gender; same DNA; look alike | identical |
| early mitotic division of the zygote | cleavage |
| solid ball of cells that results from rapid mitosis | morula |
| hollow ball of cells produced during early development | blastula |
| in early development, cells begin moving inward producing a primitive gut | gastrula |
| cells specialize into specific tissues and organs | differentiation |
| ectoderm, mesoderm, and endoderm cells that will differentiate into tissues and organs | germ layers |
| nutrition, smoking, alcohol, drugs, and injuries | factors that affect fetal development |
Created by:
aeckert
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