![subject](/tpl/images/cats/biologiya.png)
Biology, 02.09.2019 12:10 emily41950
Which is true about the pleural sac? it is continuous with the atmosphere and protects the lungs from infection. it is a closed sac surrounding each lung and contains a large volume of surfactant. it is a closed, air-filled space surrounding both lungs that has a negative pressure compared to atmospheric pressure. it is bounded by pleural membranes that are very thin, which allows for abundant gas exchange. it is a closed sac surrounding each lung that contains only a tiny volume of lubricating fluid?
![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Biology
![question](/tpl/images/cats/biologiya.png)
Biology, 21.06.2019 22:00
How does the molecular clock work? a. it analyzes the brain functionality of two different species.b. it examines and compares the physical characteristics of two different species.c. it illustrates relationships between two different species.d. it compares the number of mutations that exist in the dna of two different species.
Answers: 1
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 06:20
What makes a dominant allele different from a recessive allele
Answers: 2
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 10:00
If an organ has six haploid chromosomes,how many chromosomes are present. 6 12
Answers: 1
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 12:40
18. over time, how do sand dunes tend to migrate? a. perpendicular to the movement of the wind b. in the same direction as the wind blows c. toward the wind d. in random directions
Answers: 1
You know the right answer?
Which is true about the pleural sac? it is continuous with the atmosphere and protects the lungs fr...
Questions
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 16.05.2021 20:20
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 16.05.2021 20:20
![question](/tpl/images/cats/fizika.png)
Physics, 16.05.2021 20:20
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 16.05.2021 20:20
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/mkx.png)
Arts, 16.05.2021 20:20
![question](/tpl/images/cats/ekonomika.png)
Business, 16.05.2021 20:20
![question](/tpl/images/cats/mat.png)
Mathematics, 16.05.2021 20:20