Homologous organs

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 ...

\( \newcommand\) • • • • • • In human males, the penis serves as both a reproductive organ and as a urinal duct. Key Points • The major structure of the penis is formed by columns of corpus cavernosum and spongiosum tissue. • The head of the penis, called the glans, contains the opening for the urethral duct, the passage for urine and seminal fluid. • The penis and clitoris (found in women) are homologous organs. • Blood engorgement of penile tissue causes the penis to become erect, facilitating sexual intercourse. • Ejaculation is the release of sperm, which propels the sperm into the vaginal canal when it occurs during intercourse. Key Terms • glans: The vascular body which forms the apex of the penis. • penis: The male sexual organ for copulation and urination; the tubular portion of the male genitalia (excluding the scrotum). • intromittent organ: A term for a male external organ that delivers sperm during copulation. • clitoral glans: Highly innervated part of the clitoris that exists at the tip of the clitoral body as a fibrovascular cap. • ejaculation: The forcible ejection of semen from the mammalian urethra, a reflex in response to sexual stimulation. The penis is an intromittent organ of male animals with reproductive and urinary functions. Unlike many other species, the human penis has no baculum, or erectile bone. Instead, it relies entirely on engorgement with blood to achieve erection. The human penis cannot be withdrawn into the groin, and is larger than tha...

Being one of a pair of chromosomes, one from the female parent and one from the male parent, that have genes for the same traits in the same positions. Genes on homologous chromosomes may not have the same form, however. For example, one chromosome in a pair of homologous chromosomes may contain a gene for brown eyes, and the other a gene for blue eyes. Human females have 23 pairs of homologous chromosomes (including the two X chromosomes), while human males have 22 because the Y chromosome is not paired.

Yes, I think... Although if they have similar ancestors and perform similar functions keep in mind that they might be very closely related to each other. Convergent evolution happens if 2 different species evolve to have structure with similar functions rt(correct me if I'm wrong)? Based on that, you have an answer to your question. Now I'm not sure I fully understood you question but hopefully this helps - [Narrator] In these pictures, we might look at the fin of the shark, and say they are very similar to the flippers of a dolphin. For the dolphins we don't call them as fins, we call them as flippers. They look very similar and they're both used for swimming, so we could say, "Hey, maybe they are very related "to each other." And similarly, if you look at the wings of the bat, let me use a different color, wings of a bat, and the wings of, say, an eagle, again, both are used for flying, they look kind of similar, we might say they are related to each other. But it turns out that in reality, they are not as closely related to each other. And in fact it turns out, surprisingly, it's these two structures are more closely related than these two, or these two. Yeah, this sounds very confusing I know. And so in this video we will explore why certain structures, which might look similar and perform same function, did not necessarily mean that they are related to each other. And on the other hand, we will see that, although some other structures might look very different and per...

Difference Between Homologous and Analogous Structures Homologous and analogous structures are often confused and understanding them is of great importance in comprehending the similarities and differences between various organisms. This knowledge helps scientists to make use of other animals to study various human biological processes and drug treatments without extensive and potentially dangerous experimentation on humans. Structures with similar anatomy, morphology, Homologous vs. Analogous Structures Homologous Structure Analogous Structure Similar anatomy Dissimilar anatomy Dissimilar functions Similar Functions Inherited from a common ancestor Not inherited from ancestors Develops in related species Develops in unrelated species A result of divergent evolution A result of convergent evolution Developed as a result of the adaptation to a different environment Developed as a result of the adaptation to a similar environment An arm of a human, the leg of a dog or a flipper of a whale are all homologous structures From wings in birds, bats and insects to fins in penguins and fishes are all analogous structures These were a few differences between analogous and homologous structures. From this, we can conclude that the main difference between homologous and analogous structures is the origin of each species. Also Read:

The study of the similarities and the differences in anatomy, i.e. the body structure of two or more species is calledcomparativeanatomy. This study ofcomparative anatomyin biology is essential to understand the areas of variations that gave rise to some evolution. And to compare present organisms with prehistoric organisms, biologists and scientists use the fossil evidence left behind, to witness the occurred evolution. Evolution is a genetic change that occurs in a species of a particular area over a long time. Evolution occurs in organisms for helping them to survive in the environment. During this shuffling of genes, it results in the development of a new trait and helping the animal to survive in the environment. (image will be uploaded soon) Comparative Anatomy Definition Todefinecomparative anatomy, we can say that it is comparative studies of the anatomy of different animal species to understand the course of evolution from their common ancestors by analyzing the undergone adaptive changes. Comparative anatomy was used by early evolutionary scientists like Lamarck and Buffon for determining relationships between different species. Analogous Structures In different organisms, the same or similar structures are calledanalogous structures. Theanalogous organsserve similar functions, but they have different origins and are entirely different in their organization. For example, the wings of the birds and that of the insects perform the same task, i.e. wings in both orga...