branchial slit

简明释义

鳃缝;

英英释义

例句

1.The anatomy of the branchial slit 鳃裂 is crucial for understanding vertebrate evolution.

了解脊椎动物的进化，branchial slit 鳃裂 的解剖结构至关重要。

2.Some species retain their branchial slit 鳃裂 into adulthood, allowing them to breathe underwater.

一些物种在成年时保留了它们的branchial slit 鳃裂，使它们能够在水下呼吸。

3.In some amphibians, the branchial slit 鳃裂 is present during the larval stage.

在某些两栖动物中，branchial slit 鳃裂 在幼虫阶段是存在的。

4.During embryonic development, the branchial slit 鳃裂 forms as part of the pharyngeal arches.

在胚胎发育过程中，branchial slit 鳃裂 作为咽弓的一部分形成。

5.The fish uses its branchial slit 鳃裂 to filter food from the water.

鱼利用它的branchial slit 鳃裂 从水中过滤食物。

作文

The study of evolutionary biology often brings to light fascinating structures and features that have played crucial roles in the development of various species. One such feature is the branchial slit, which is an essential anatomical structure found in many aquatic organisms, especially during their embryonic stages. Understanding the branchial slit and its functions can provide significant insights into the evolutionary history of vertebrates. The branchial slit, or gill slit, refers to openings located on the sides of the pharynx in developing embryos of vertebrates, including humans. In fish, these slits develop into functional gills that allow for respiration underwater. However, in higher vertebrates, such as mammals, these slits do not develop into functional gills but instead contribute to the formation of various structures in the head and neck region.During early embryonic development, all vertebrate embryos exhibit similar features, including the presence of branchial slits. This commonality suggests a shared ancestry among vertebrates, highlighting the importance of these structures in understanding evolutionary relationships. As the embryo develops, the branchial slits undergo significant changes, leading to the differentiation of various organs and tissues. In human embryos, for instance, the first two pairs of branchial slits contribute to the formation of the jaw, ears, and throat, showcasing their vital role in the development of complex structures.From an evolutionary perspective, the existence of branchial slits in vertebrate embryos is a testament to the shared lineage of life forms. The transition from aquatic to terrestrial life necessitated significant anatomical changes, and while the branchial slits no longer serve their original purpose in land-dwelling vertebrates, their presence in embryonic stages indicates how evolution has shaped the anatomy of different species. This evolutionary principle is encapsulated in the phrase "ontogeny recapitulates phylogeny," which suggests that the development of an individual organism mirrors the evolutionary history of its species.Moreover, studying branchial slits can also shed light on developmental disorders and congenital anomalies. In some cases, improper development of these structures can lead to conditions such as branchial cleft cysts or fistulas, which arise from remnants of the branchial slits during embryogenesis. Understanding the normal development of these structures is crucial for diagnosing and treating such conditions effectively.In conclusion, the branchial slit is more than just an anatomical feature; it serves as a window into the evolutionary past of vertebrates and provides insight into the complexities of developmental biology. By examining the role of branchial slits in both aquatic and terrestrial organisms, researchers can better understand the processes that have shaped life on Earth. The study of these structures not only enriches our knowledge of biology but also emphasizes the interconnectedness of all living beings, reminding us of our shared origins and the intricate tapestry of life that continues to evolve around us.

进化生物学的研究常常揭示出在各种物种发展过程中发挥关键作用的迷人结构和特征。其中一个特征是腮裂，这是许多水生生物，尤其是在其胚胎阶段，所具有的重要解剖结构。理解腮裂及其功能可以为我们提供关于脊椎动物进化历史的重要见解。腮裂，或称为腮口，是指位于脊椎动物发育胚胎的咽部两侧的开口。在鱼类中，这些裂缝发展成功能性的腮，使它们能够在水下呼吸。然而，在更高等的脊椎动物中，例如哺乳动物，这些裂缝并不发展成功能性腮，而是有助于头部和颈部各种结构的形成。腮裂在早期胚胎发育过程中，所有脊椎动物胚胎都表现出相似的特征，包括腮裂的存在。这种共同性表明脊椎动物之间的共享祖先，突显了这些结构在理解进化关系中的重要性。随着胚胎的发展，腮裂经历显著变化，导致各种器官和组织的分化。例如，在人类胚胎中，前两对腮裂有助于下颌、耳朵和喉咙的形成，展示了它们在复杂结构发育中的重要作用。从进化的角度来看，脊椎动物胚胎中存在腮裂是生命形式共享谱系的证明。从水生到陆生生活的转变需要显著的解剖变化，虽然腮裂在陆生脊椎动物中不再发挥其原始功能，但它们在胚胎阶段的存在表明进化如何塑造不同物种的解剖结构。这一进化原则被概括为“个体发育重述系统发育”，即一个有机体的发展反映其物种的进化历史。此外，研究腮裂还可以揭示发育障碍和先天性异常。在某些情况下，这些结构的发展不正常可能导致如腮裂囊肿或瘘管等疾病，这些疾病源于胚胎发育过程中腮裂的残余物。了解这些结构的正常发育对于有效诊断和治疗此类疾病至关重要。总之，腮裂不仅仅是一个解剖特征；它是我们了解脊椎动物进化过去的窗口，并为我们提供了对发育生物学复杂性的洞察。通过考察腮裂在水生和陆生生物中的角色，研究人员可以更好地理解塑造地球生命的过程。这些结构的研究不仅丰富了我们对生物学的认识，也强调了所有生物之间的相互联系，提醒我们共享的起源以及继续演化的生命复杂织锦。