placental

简明释义

英[pləˈsentl]美[pləˈsentl]

adj. 胎盘的；胎座的

n. 有胎盘哺乳动物

英英释义

单词用法

同义词

反义词

例句

1.To evaluate the cause, danger, prevention and treatment of placental abruption.

目的探讨胎盘早剥的诱因、危险性及防治措施。

2.“The fossil record continues to show that the origin of modern placental mammals postdates or is at the Cretaceous-Paleogene boundary, ” he said.

他说：“化石记录一再证实现代胎盘类哺乳动物的起源是在白垩纪-早第三纪分界点的时候或那之后。

3.The obvious pathological changes were found in ultrastructure of placental trophoblast of study group.

妊高征组胎盘滋养层细胞超微结构有明显的病理学改变。

4.The structure of special placental blood vessel had special characteristics.

特殊胎盘的血管结构均有特殊性。

5.If the cells did cross the placental barrier, the child's immune system should have recognised them as foreign invaders and destroyed them.

如果癌细胞确实穿过胎盘屏障，孩子的免疫系统应该会将它们视为入侵者，从而消灭它们。

6.Objective: To investigate the etiology, early diagnosis and treatment of placental abruption.

目的：探讨胎盘早剥的病因、早期诊断及处理方法。

7.To study the relation between placental mature grading and placental function to improve the method of monitoring placental function.

探讨孕妇胎盘成熟度分级与胎盘功能之间的联系，以提供更多监测胎盘功能的方法。

8.During pregnancy, the placental 胎盘的 blood flow is crucial for nutrient transfer.

在怀孕期间，胎盘的血流对营养物质转移至关重要。

9.Doctors monitor placental 胎盘的 health to ensure a safe pregnancy.

医生监测胎盘的健康以确保安全的妊娠。

10.The study focused on the role of placental 胎盘的 hormones in fetal development.

这项研究集中于胎盘的激素在胎儿发育中的作用。

11.Researchers found that certain placental 胎盘的 proteins can influence maternal health.

研究人员发现某些胎盘的蛋白质可以影响母体健康。

12.The placental 胎盘的 barrier protects the fetus from harmful substances.

胎盘的屏障保护胎儿免受有害物质的侵害。

作文

The fascinating world of biology is filled with complex systems and intricate relationships, one of which is the role of the placental (胎盘的) structure in mammalian reproduction. The placental (胎盘的) system serves as a vital organ that connects the developing fetus to the mother, facilitating the exchange of nutrients, gases, and waste products. Understanding the importance of this organ can provide insight into not only the development of individual organisms but also the evolution of species over time.In mammals, the placental (胎盘的) connection allows for a more prolonged gestation period compared to other classes of animals. This extended development inside the womb leads to more advanced offspring at birth. For instance, humans have a gestation period of about nine months, which allows the fetus to develop essential organs and systems before entering the world. The placental (胎盘的) structure plays a crucial role during this time, as it ensures that the fetus receives adequate oxygen and nutrients from the mother's bloodstream while simultaneously removing carbon dioxide and other waste products.The evolutionary significance of the placental (胎盘的) system cannot be overstated. It is believed that the advent of the placental (胎盘的) mammals allowed for greater survival rates among young animals. This adaptation likely provided a competitive advantage, allowing species with a placental (胎盘的) reproductive strategy to thrive in various environments. Over millions of years, the diversity of placental (胎盘的) mammals has increased, resulting in the wide variety of species we see today, from elephants to bats.Moreover, the study of the placental (胎盘的) structure has significant implications for medical science. Research into placental (胎盘的) function has led to a better understanding of pregnancy complications such as preeclampsia and gestational diabetes. By studying how the placental (胎盘的) organ develops and functions, scientists can develop new treatments and interventions that promote healthier pregnancies and outcomes for both mothers and their babies.In addition, the placental (胎盘的) barrier serves as an interesting subject of study in immunology. The placental (胎盘的) tissue has unique properties that allow it to tolerate the presence of foreign cells from the fetus, which carries genetic material from both parents. Understanding how the placental (胎盘的) system manages this immune tolerance could pave the way for advancements in organ transplantation and autoimmune disease treatment.In conclusion, the placental (胎盘的) structure is a remarkable feature of mammalian biology that highlights the intricate connections between mother and child. Its role in nutrient exchange, evolutionary advantages, and medical research illustrates the importance of this organ in both individual health and the broader context of biological diversity. As we continue to explore the complexities of life, the placental (胎盘的) system will undoubtedly remain a focal point for scientific inquiry and discovery.