What is the role of valves in the human circulatory system?

Answers

Answer 1

Answer:

Valve, in anatomy, any of various membranous structures, especially in the heart, veins, and lymph ducts, that function to close temporarily a passage or orifice, permitting movement of a fluid in one direction only.


Related Questions

Which region was the hearth for the largest number of agricultural animals, such as pigs, sheep, and cows?

A. Latin America
B. Europe
C. Central Asia
D. Southwest Asia
E. sub-Saharan Africa

Answers

Answer:

Southwest Asia

hope this helps you

Answer:

C

Explanation:

Why is the Northeast Plain important to East Asia?
A.
It is an alluvial plain.
B.
It has fertile black soil that is important for farming.
C.
It serves as a boundary between China and India.
D.
It contains one of the world’s most populated areas.

Answers

Answer:

It's B.

Proof↓

Answer:

Explanation:

b

What is a ecosystem

Answers

Answer:

The simplest definition of an ecosystem is that it is a community or group of living organisms that live in and interact with each other in a specific environment.

Answer:

An ecosystem is a natural environment that includes , plant and animal, which live and interact within the environment

Which major religion got its start in East Asia?
Hinduism
Islam
Buddhism
Daoism

Answers

Answer:

Daoism

Explanation:

Discuss changes to demand for fuel resources such as coal, petroleum, and natural gas as the demand for energy increases around the world in the modern global economy. Then, discuss the distribution of supply for these resources.

Answers

Answer:

As economies advance, they require more energy.  Given today's focus on greenhouse gases, coal usage will decrease. Natural gas is plentiful and is easily used for heat and as a feedstock for chemical production. Petroleum is also readily available and can be converted to energy and chemicals.

Explanation:  All three resources are transportable and sources are located across the globe. However they require transportation to areas which don't have ready access. This requires roads, railways, pipelines and ships.

The changes to demand for energy resources such as coal and petroleum has decreased as there is a shift in demand for natural resources of energy due to pressure from the global economy for cleaner and efficient energy.

What are the resources of energy?

There are different resources of energy based upon their procurement methods and generation techniques. Chemical resources of energy are generally non-renewable and polluting to the environment.

Natural resources of energy like wind and solar energy have experienced a rise in demand as they are renewable, and also least harmful to the environment.

The supply of these energy resources are uneven throughout the world, as some countries fall short of the required elements for the generation of these energy resources.

Hence, the significance of resources of energy is aforementioned.

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750
64°
2
The measure of the exterior angle of the triangle is

Answers

The measure is going to be 139 and the reason why is because the 750 is at the end

Meir has been called the Iron Lady of Israel. What do you think this term means? In what ways was Meir an Iron Lady?

Answers

Answer:

she was the first and only woman to be holding  the office of prime minister

The logo you are using is 1 1/4 inch in length and 2 inches wide. Your wall is 13 feet wide and 8 feet tall. How big can you make the logo so it fits on the wall if your scale factor is 1/4 inch represents 1 1/2 feet?

Answers

Answer:

make sure u use only formula

Explanation:

done

Select the correct answer.
Ms. Jones brought this rock to her science class and instructed her students to explain how it was formed. Which explanation is a true description of the rock?



A.
Leaves were trapped between layers of sediment millions of years ago, causing the imprint.
B.
Leaves grew from the crevices of the rock from the right balance of light, nutrients, and moisture.
C.
The alternating imprinted design is the result of hot and cold spots when the rock cooled millions of years ago.
D.
A rock under high temperature and pressure pressed against the leaves, turning the leaves to stone.

Answers

Answer: A

Explanation: Hope This helps

PLEASE HELP!! THIS IS DUE IN 10 MINS AND IM FAILING!!!

Answers

i really dont know but id say whena animal becomes a neutor

Explanation:

In India, the ratio of women to men is:
A. 8:9
B. 7:6
C. 4:1
D. 9:10

Answers

Answer:

I THINK it is 4:1

Explanation:

If not try 7:6

9. Examine the challenges and future perspective of human resource
development in the context of Nepal.​

Answers

Answer:

ok humans are special and king to be honest

Answer:

Hi, Lack of access of education in rural areas. Poverty and backwardness of people. Rapid increase in brain drain. High expectation but low mentality of people.

Challenges of Human Resource Development in Nepal

The major challenges for human resource management in Nepal are:

Lack of access of education in rural areas.

Poverty and backwardness of people.

Rapid increase in brain drain.

High expectation but low mentality of people.

Explanation:

SOLUTIONS

Put strategic organizational change into practice to enhance quality, productivity and employee satisfaction

Devise an effective training program

Create and establish a reward system that keeps employees motivated

Design benefit packages and evaluate their value

Establish principles for developing, harnessing and retaining talent

Use big data to enable knowledgeable business decisions

Leverage technology to assist in the creation of talent pools where leaders may emerge from in the future

I hope you'll find this information helpful for you!

What is the defining characteristic of mammals?

Answers

Answer:

The characteristics that make a mammal a mammal include pres- ence of hair or fur, warm-blooded, young born alive, mammary glands and complex brain. 5) it has a larger and more complex brain than any of the other animal groups.

Explanation:

The characteristics that make a mammal a mammal include pres- ence of hair or fur, warm-blooded, young born alive, mammary glands and complex brain. 5) it has a larger and more complex brain than any of the other animal groups. 1. Name five animals in Illinois that are mammals.

If Michigan had 24 deaths from extreme cold in the last 20 years, what is the risk they will have a death this year? (very unlikely, unlikely, likely, very likely) Provide evidence.

Answers

Answer: Very Likely

Explanation:

Michigan has had 24 deaths from extreme cold in the last 20 years.

This is a rate of:

= 24 / 20

= 1.2 deaths per year.

For something to be considered ''very likely'' to occur, the chances of that thing occurring needs to be above 90%.

Going by the deaths per year, the probability is more than 90% at 120%. It is therefore very likely that there will be a death from extreme cold.

calculate voltage when current is 0.6 and resistance is 10​

Answers

Answer:

0.06

Explanation:

minus the amount of resistance to the amount of voltage

Use the given functions to set and simplify es⋅10es⋅10.

the = the =

the = the =

is⋅0 = 0 is⋅0 = 0

6yla = 06yla = 0

is⋅10 = 10eses⋅10 = 10es

What is the name of the second planet

Answers

The second planet from the Sun is Venus.

Hope this helps; have a great day!

"The democratic culture helps for the progress and prosperity of the nation." Explain in detail. ​

Answers

Answer:

development have had a strong correlative and interactive relationship throughout history. While evidence of this relationship's existence is irrefutable,[1] economists' and historians' opinions of its exact nature have been sharply split, hence the latter has been the subject of many debates and studies.

what were the Middle Colonies like?

Answers

Answer:

The middle colonies had deep, rich soil. The fertile soil was good for farming. These colonies had mild winters and warm summers. There were many long, wide rivers that were used to ship goods to other colonies.

Explanation:

What best describes convergent plate boundaries and what geologic structure does
converging plates create?

Answers

Explanation: At convergent plate boundaries, oceanic crust is often forced down into the mantle where it begins to melt. Magma rises into and through the other plate, solidifying into granite, the rock that makes up the continents. Thus, at convergent boundaries, continental crust is created and oceanic crust is destroyed.

As some regions move away from shifting cultivation to other forms of agriculture, which is least likely to result?

A. inefficient cultivation
B. deforestation
C. increased global warming
D. unbalanced ecosystems
E. soil erosion

Answers

Answer:

B: deforestation

Explanation:

Shifting cultivation (also known as slash-and-burn agriculture) is when farmers clear land for planting by slashing vegetation and burning debris. Shifting cultivation is literally a practice of deforestation. If you stop shifting cultivation, you are going to be preventing the practice of deforestation. Therefore deforestation is the least likely result of moving away from shifting cultivation.

As some regions move away from shifting cultivation to other forms of agriculture, deforestation is least likely to result.

What is deforestation?

The process of cutting down of trees and forests in order to build infrastructure for living, residency and any such purpose is known as deforestation. It is a negative effect of shifting cultivation.

Hence, option B states about deforestation.

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How can some water be used even if it isn't clean enough to drink?

Answers

Agricultural use, energy and to cool factories

or

construction, watering lawns, manufacturing use

The waste water can be effectively used for agriculture purpose, construction works and gardening.

What is waste water management?

A technique called wastewater treatment is used to clean up impurities from wastewater and turn it into an effluent that can be reintroduced to the water cycle. The wastewater either has a minimal influence on the environment after entering the water cycle or is utilized for different reasons.

As much suspended solids as possible must be eliminated during wastewater treatment before the leftover water, known as effluent, is released back into the environment.

The oxygen that is needed by the aquatic plants and animals is depleted during the breakdown of solid matter.

Septic tanks are the most typical onsite wastewater treatment system type. biological filter systems used in aerated wastewater treatment systems (AWTS).

Once it has been treated, it can be utilized in place of freshwater for enjoyment, industrial activities, and irrigation.

Additionally, it can be used to keep the environment flowing, and the byproducts of its processing can produce energy and nutrients. The report claims that wastewater treatment offers a double benefit.

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"-ic" means plz help​

Answers

Answer:

uhh ok..

Explanation:

Answer:

The suffix "-ic" means of or pertaining to.

Explanation:

:>

Before the Sacrament of Reconciliation, we should examine our
conscience.

True or false

Answers

True : )
I’m 99% sure that it is true.

Which of the following statements about the relationship between the development of technology and patterns of settlement is false? A. The development of technology promotes global migration. B. The development of technology promotes the development of economies. C. The development of technology results in the expansion of cities and increased urbanization. D. The development of technology results in centralized governments, economies, and cultural development. Please select the best answer from the choices provided. A B C D

Answers

Answer:

A. The development of technology promotes global migration.

Explanation:

There is a great relationship between the development of technology and patterns of settlement because development of technology in a specific area attracts people of other regions and the settlement of that area is increases. Due to advance technology, the country made products and machines which can be sold to other countries at high price and improves the economy of the country.

Answer: Answer is D:  

The development of technology results in centralized governments, economies, and cultural development.

Explanation:

Verified in the test.

Match each statement with the type of weathering it describes. the answers can be used more than once

Answers

Answer:

1/2: mechanical weathering.

3/4/5: chemical weathering

Explanation:

In Central Asia, farming is most common in the

Answers

Answer:

Agriculture. By far the greater part of Asia remains uncultivated, primarily because climatic and soil conditions are unfavourable. Conversely, in the best growing areas an extraordinarily intensive agriculture is practiced, made possible by irrigating the alluvial soils of the great river deltas and valleys. Of the principal crops cultivated, rice, sugarcane, and, in Central Asia, sugar beets require the most water.

Answer:

brainliest please

Explanation:

Agricultural land in Central Asia is mostly desert and mountain pastures. Arable land suitable for crop production is around 20% of total agricultural land (and as low as 4% in Turkmenistan). In Russia and Ukraine, on the other hand, arable land is 60%-80% of agricultural land.

Europe was called ‘the most active of all continents’.

Answers

Answer:

yes, during the third age too the early industrial age

A storm surge is characterized by

large hail.
strong winds.
severe lightning.
coastal flooding.

Answers

Answer:

D.coastal flooding.

Explanation:

Answer:

D

Explanation:

I WILL GIVE BRAINLIEST PLEASE VERY VERY VERY VERY EASY!












Select all of the answers that apply.


Air pressure _____.


is the weight of air molecules

decreases as altitude increases

doesn't affect wind patterns

can balance by popping your ears

Answers

is the weighr of air molecules

The strenght of an earthquake depends in part on

Answers

Answer: The logarithm of the amplitude of waves recorded by seismographs.

Explanation:

(Sorry if it’s wrong! I don’t remember it super well, but I think this is it. Also, here’s a picture.)

Answer and Explanation:

Magnitude is related to the amount of seismic energy released at the hypocenter of the earthquake. It is based on the amplitude of the earthquake waves recorded on instruments which have a common calibration. The magnitude of an earthquake is thus represented by a single, instrumentally determined value.
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