Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Module 15
Reproductive System
| Term | Definition |
|---|---|
| Primary Sex organs | Testes and ovaries |
| Secondary sex organs | penis and uterus |
| spermatic cord | strand of connective tissue extending from the abdomen to each testicle |
| cremaster mucle | surrounds the spermatic cord and contracts in cold weather to draw testes closer to body for warmth |
| stored mature sperm remain fertile for.... | 40-60 days |
| leydig cells | produce testosterone |
| seminiferous tubules | ducts in which sperm are produces, contained in the walls are sertoli cells which promote the development of sperm |
| epididymis | where sperm mature and ultimately are stored |
| vas deferens | structure that travels from the epididymis through the spermatic cord into the pelvic cavity and over the ureter to the prostate |
| onset of puberty triggers the secretion of two gonadotropins.... | FSH and LH |
| seminal vesicle | secretes fluid containing semen,frutose, and other substances into ejaculatory duct |
| ejaculatory duct | a pair of tubules that pass through the prostate and empty into the urethra |
| corpus cavernosa | two large cylinders of erectile tissue that fill the shaft of the penis |
| spermatogenesis | begins in the seminiferous tubules |
| acrosome | enzymes that help the sperm penetrate the egg during fertilization |
| two key qualities of semen include.. | stickiness and alkalinity |
| semen stickiness quality | allows semen to stick to the walls of vagina and cervix instead of immediately draining out |
| semen alkalinity | counteracts the acidity of vagina |
| ovaries | two, about the shape of almonds, sits on each side of the uterus, produce eggs and sex hormones, contains thousands of immature eggs. |
| vagina | muscular tube that serves as a receptacle for the penis and sperm |
| an embryo.... | attaches to the endometrium of the uterus |
| uterus | muscular chamber that houses a growing embryo |
| acini | secretes milk during lactation |
| the reproductive cycle averages.. | 28 days in length |
| ovulation | prompted by spike in LH |
| falling levels of estrogen and progesterone trigger.. | menstruation |
| hormonal method of birth control | interferes with follicular development and ovulation |
| gestation cycle | about 40 weeks |
| second trimester | weeks 13 through 24, most of the organs are deeloped |
| preembryonic stage | begins when fertilization forms azygote with 46 chromosomes |
| morula results | blackberry like cluster of 16 cells, mitotic divisions |
| trophoblast | plays key role in ensuring the continuation of an early pregnancy |
| amnion | filled with fluid the protects the embryo from trauma and changes in temp. |
| embryonic stage begins .... | once germ layers are formed (16 days after conception) |
| the umbilical cord contains... | two umbilical arteries and one umbilical vein |
| the mothers blood and fetus blood.. | does not mix |
| fraternal twins | two placentas |
| the placenta also secretes... | estrogen,progesterone, and HCG to maintain the pregnancy |
| most of the blood bypasses the liver by... | flowing through the ductus venosus into the inferior vena cava |
| the heart begins to beat... | around day 22 |
| oxygen-depleted blood flows through the two umbilical arteries to the placenta.... | re-oxygenates it and returns it to the fetus through the umbilical vein |
| fetal movement (quickening) can be felt... | week 20 |
| the respiratory system, although immature, is capable of gas exchange | at 28 weeks. |
| physical changes with pregnancy in circulatory system | increase blood volume by 30-50%, cardiac output increase 30-40% by week 27, as uterus demands more blood supply, heart rate increases also |
| probable triggers to labor... | decline in progesterone, release of oxytocin, uterine stretching |
| first stage of labor is longest: | 6-18 hours for first time, short for multiple pregancy |
| stage two of labor | begins with full dilation of the cervix and ends when the baby is born |
| anterior pituitary- prolactin | milk production |
| posterior pituitary- ocytocin | milk secretion, causing the lobules in the breast to contract forcing milk into the ducts |
| heredity | process of passing traits from biological parents to children |
| genetics | the study of inheritance |
| genes | segments of DNA |
| chromosomes | consist of long strands tightly coiled DNA |
| autosomes | chromosomes from mother and chromosomes from father |
| female gametes contain only... | X chromosomes |
| a child's sex is determined by... | the presence or absence of certain chromosomes |
| A child's genetic information | is inherited from both the mother and father |
| genome | a complete set of genetic information for one person |
| homozygous | person has two alleles that are the same |
| heterozygous | if the alleles are different |
| for a recessive allele to be expressed, | both chromosomes must carry identical allels |
| mutation | a permanent change in genetic material |
| autosomal recessive inheritance | children who inherit a single copy of the allele become carriers of the disorder( they cant get it but can pass it on to their children. |
| autosomal dominant inheritance | child receives one copy from mother and one from father, child has 50% chance of developing the disorder |
Created by:
Kylee_cheyenne
Popular Anatomy sets