Homologous organs are

Sex Organ Homologies Homologies of the Sex Organs Homologies of Sexual Organs Male Female Testis Ovary Appendix testis Fimbriated end of uterine tube Gubernaculum Ligamentum teres uterus Ductus deferens Paroophoron (Gartner's duct) Seminal vesicles ----- Urethra Urethra Prostate Paraurethral glands Prostatic utricle Vagina (lower end) Penis Clitoris Urethral surface of penis Labia minora Corpora cavernosa penis Corpora cavernosa clitoridis Corpus spongiosum Vestibular bulb Scrotum Labia majora ----- Uterine tube ----- Uterus and upper vagina ----- Broad ligament Please contact: Last Updated: May 22, 1996 Created: November 1, 1995

Image from The battle of the sexes. Men vs. women. Anything you can do, I can do better. For all that battling, it’s amazing how similar we can be. The bits and bobs that everyone seems to think separate us? Really quite similar, actually. "But," I can hear some of you saying, "there are some obviousdifferences." I know what you're thinking… But even if the structures of our reproductive systems look quite different, what if I told you many of their functions are amazingly similar? And here’s the mind-blowing part: there's a stage in utero in whichmale and female anatomy is indistinguishable. Let’s take a look at some similarities between the male and female reproductive systems. Development of Internal Genitalia (or: Seriously, Our Anatomy Was Exactly the Same At One Point) There is a time in utero when a developing embryo doesn’t have a noticeable sex. Around 6 weeks, the internal and external genitalia develop, but it’s an in-between state of undifferentiated gender. Think of it like a caterpillar in a chrysalis, undergoing a big change. An embryo in the early stages (around weeks 5–6) has reproductive structures, ducts, and gonads that can develop into a female or male system. Once the genes determining sex are activated, the appropriate structures will remain while the others degenerate. In the case of a female embryo, it is the paramesonephric (Mullerian) ducts; for the male, it is the mesonephric ducts that develop. The gonads will develop into ovaries or testes. Im...

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Have you ever thought about how different kinds of animals have body parts that work in similar ways? Like bats and bees? Both creatures have wings - even though their bodies are structured very differently. The key to understanding these differences lies in knowing what homologous and analogous structures are. In this article, we'll talk about each type of structure and discuss the similarities and differences between them. What Are Homologous Structures? Homologous structures are similar structures in related organisms. The most important thing to remember about homologous structures is that they share common ancestry. In other words, only organisms that are somehow related to each other can have homologous structures. For example, a chimpanzee’s arm and a human’s arm are homologous structures. Both sets of arms have a similar structure and use and chimpanzees and humans share a common ancestor. What Are Analogous Structures? Analogous structures are similar structures in unrelated organisms. These structures are similar because they do the same job, not because they share common ancestry. For example, dolphins and sharks both have fins, even though they aren’t related. Both species developed fins because of how (and where) they live. What’s the Difference Between Homologous and Analogous Structures? Homologous and analogous structures have several key differences. Let’s take a look at them: Homologous Structures Analogous Structures • Shared ancestry • Similar internal ...

Table of Contents • • • • What are homologous organs explain with examples? Homologous organs : The organs which have the anatomically same structure but are different in functions are called homologous organs. Examples of homologous organs are as follows: Mouth parts of cockroach, honey bee, butterfly. Forelimb of man, whale, bat, cheetah. Thorns of Bougainvillea and tendril of Curcurbita. What is an example of a homologous trait? The arm of a human, the wing of a bird or a bat, the leg of a dog and the flipper of a dolphin or whale are homologous structures. They are different and have a different purpose, but they are similar and share common traits. They are considered homologous structures because they have a similar underlying anatomy. What is homologous organs give example? Homologous organs : The organs which have the anatomically same structure but are different in functions are called homologous organs. Examples of homologous organs are as follows: Mouth parts of cockroach, honey bee, butterfly. Forelimb of man, whale, bat, cheetah. READ ALSO: What a good husband does for his wife? What is analogous example? analogy, in biology, similarity of function and superficial resemblance of structures that have different origins. For example, the wings of a fly, a moth, and a bird are analogous because they developed independently as adaptations to a common function—flying. Are dogs homologous or analogous? Homology In the Animal Kingdom The arm of a human, the wing of a ...

Organs, which have a common fundamental anatomical plan and similar embroyonic origin whatever varied functions they may perform are regarded as homologous organs. For instances the flippers of a whale, a bats wing, fore-limb of a horse, a birds wing and forelimbs of human are structurally as well as functionally different . Whale’ this flippers help in swimming, wings of birds and bat are used in flying, horse’ this forelimb help in running and human’s hand is meant for grasping. They are structurally modified accordingly. However, anatomically they have similar bones, humerus in the upper arm, radius ulna in the forearm, carpals and metacarpals in the wrist and hand. Presence of homologous organs in different groups of animals indicates their common origin or ancestry and degree of closeness to difference among various groups.

Hint: Homologous organs are unique organs and have an alternate aim, perform different functions, and have the same origin. Example- arms of humans. That means they may have similar origins but have dissimilar functions. Complete answer: Homologous structures are organs or skeletal elements of animals and organisms. These organs show similarity in their connection to a common ancestor by virtue. Though, these structures do not look exactly the same or perform the same function. The most important character as hinted by their name is that they are structurally similar. Examples of Homologous Structures The arm of a human, the leg of a dog, the wing of a bird or a bat, and the flipper of a dolphin or whale. These are homologous organs because they are different and have a different purpose, but they are similar and share common traits. > Option A- Dissimilar origin and dissimilar structure This is not correct because homologous organs have similar origin. > Option B- Dissimilar origin but similar functions This option is wrong because homologous organs have similar origin with dissimilar functions. > Option C- Similar origin with similar or dissimilar functions This is incorrect because homologous organs surely have dissimilar functions. They never have similar functions. > Option D- Similar origin with dissimilar functions This is the correct option because homologous organs have similar origins with dissimilar functions. Hence, the correct answer is option (D). Note: Homol...

Learning Objectives • Compare homologous and analogous traits Scientists must collect accurate information that allows them to make evolutionary connections among organisms. Similar to detective work, scientists must use evidence to uncover the facts. In the case of phylogeny, evolutionary investigations focus on two types of evidence: morphologic (form and function) and genetic. In general, organisms that share similar physical features and genomes tend to be more closely related than those that do not. Such features that overlap both morphologically (in form) and genetically are referred to as homologous structures; they stem from developmental similarities that are based on evolution. For example, the bones in the wings of bats and birds have homologous structures (Figure 1). Figure 1. Bat and bird wings are homologous structures, indicating that bats and birds share a common evolutionary past. (credit a: modification of work by Steve Hillebrand, USFWS; credit b: modification of work by U.S. DOI BLM) Notice it is not simply a single bone, but rather a grouping of several bones arranged in a similar way. The more complex the feature, the more likely any kind of overlap is due to a common evolutionary past. Imagine two people from different countries both inventing a car with all the same parts and in exactly the same arrangement without any previous or shared knowledge. That outcome would be highly improbable. However, if two people both invented a hammer, it would be re...