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Reproductive System
Questions about the organs, cells and hormones associated with sexual reproduction.
1,743 Questions
What does a kangaroo's reproductive system consist of?
Kangaroos do not have advanced placentas, and have epipubic bones. Epipubic bones are bones which project forwards from the pelvis. In the case of marsupials, these bones support the female's pouch, but there are other mammals which are not marsupials which also have epipubic bones. The excretory and reproductive systems of placental mammals and marsupials are also different.
Female kangaroos, like other marsupials, have two vaginas, or what are called paired lateral vaginae. These are for the purpose of transporting the sperm to the womb, but there is a midline pseudovaginal canal for actually giving birth. As well as two vaginas and two uteruses, female marsupials have two fallopian tubes and two cervixes. Most kangaroo species, with the exception of the largest of the species (the Red Kangaroo, Western Grey and Eastern Grey) have a two-pronged penis to accommodate the females' two vaginas.
Autogamy is pollination of the ovules of a flower by its own pollen; self-fertilization or conjugation in an individual organism by division of its nucleus into two parts that in turn reunite to form a zygote.
What is the difference between sperm production and storage?
Production is like the manufacturing step for a product while storage is like
keeping the product in the warehouse until it is ready to ship. Sperm, however,
have a very limited shelf-life, so another difference in that specific case is the fact
that production is very effective but storage doesn't work very well. A lot like
tomatoes and bananas.
What is the basic anatomy in the male's reproductive system?
anatomical phylogeny of male reproductive system in plant?
Where does fertilization of an egg to form a zygote takes place?
In the fallopian tubes of a female's reproductive system
An immature egg (oocyte) is ejected from the ovaries through ovulation and is picked up by the fimbriae. The oocyte will enter the uterine tubes through the infundibulum and be pushed through by ciliated cells. The uterine tubes curve in an area called the ampulla, which is where fertilization takes place and a oocyte becomes a zygote.
What do regeneration and vegetative reproduction have in common?
making new offsprings by themselves is what they have in common
Why are there two genders of humans and animals?
There are multiple questions here:
- Why did sexual reproduction evolve?
- Why did sexual dimorphism (ie. the differences between genders) evolve?
To answer the first question, we must take a close look at what sexual reproduction is, in its most basic form. The answer I provide here is: sexual reproduction is the exchange of genetic materials between organisms, whereby some of the exchanged genetic traits are inherited by offspring. Now we know that even simple single-celled organisms exchange genetic materials. For instance, bacteriae store part of their genomes in plasmids, which are freely exchanged between bacteriae in the same population. There are various scenarios that describe how such simple lateral gene transfer may have evolved into more complex sexual reproduction involving gametes; scenarios which I will not outline here. Suffice it to say that despite the costs involved with sexual reproduction, there are distinct benefits that result in an increased overall fitness of the offspring, which is why sexual reproduction would be promoted if it were to arise. It is these costs, by the way, that explain why there have not evolved more than two genders.
To answer the second question again requires that we ask what the most fundamental differences are between male and female. Richard Dawkins explains in his book The Selfish Gene: "However, there is one fundamental feature of the sexes which can be used to label males as males and females as females, throughout animals and plants. This is that the sex cells or 'gametes' of males are much smaller and more numerous than the gametes of females." Again, there are numerous hypothetical scenarios by which such an asymmetry might result in the evolution of pronounced behavioural and morphological differences between males and females. The most frequently occurring pattern in male-female relationships, ie. the promiscuity of the male vs. the chastity of the female, is easily explained considering that it costs males next to nothing to produce countless sperms and impregnate as many females as he can find willing - while the female has a limited supply of eggs, in which she has invested much more resources, and therefore much choose carefully what genes to combine hers with.
What is the passage that leads to the internal female reproductive organs?
The vagina is the passage that leads to the internal female reproductive organs
Do prescription drugs affect your reproductive system?
Some can. Most don't (if taken as prescribed).
Who makes the baby man or women?
Making a baby is equal parts from the man and the woman. The woman's body produces the egg cell and the man's body produces sperm cells.
When one of the sperm cells unites with the egg cell, then the baby starts to develop.
From then on, all the work of 'making the baby' is done by the woman's body. So you could say that it takes two to start the baby but the woman 'makes the baby'!
How many alleles are there for a trait in a sex cell?
An allele is one form of a gene. Alleles separate into separate sex cells during meiosis.
What is the passageway for conveying sperm from the epididymis to the ejaculatory duct?
The vas deferens carries the sperm to the ejaculatory ducts.
Is it weird or gross to have 1 testicle?
Not at all. call it oneball or uni ball and be proud about it.
Is there a hole between the bum and vagina?
Not usually. Sometimes, there can be damage (for example from sexual abuse) from tissue tearing and a hole called a fistula can open up between the bum and vagina. This is a serious medical problem and should be refered to a hospital.
The human female reproductive system is adapted for?
Transport of Oxygen through the placenta to the fetus
What's the procedure for a man not to reproduce?
The options for a man who wants to avoid fathering a child are abstinence from vaginal sex, using codoms, withdrawal or coitus interruptus, and vasectomy. Abstinence is the most effective, followed by vasectomy, condoms, and withdrawal. In addition, a couple may use methods under the control of the female.
Wich structure in the male has both reproductive and excretory functions?
The urethra is the male structure which has both reproductive and excretory functions.
A male and female have sexual intercourse. The male releases sperm into a female vagina which will swim up into her oviduct. If there is an egg there and one of the sperm makes it the sperm will fuse with the egg. The egg will then move down into the uterus and the cell will divide. If all goes well a baby will begin to grow.
