1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Phantasy [73]
3 years ago
8

20 POINTSS!!!!

Biology
1 answer:
Ahat [919]3 years ago
5 0

Answer:

The innate or nonspecific immune system includes two lines of defense in the human body. Non-specific means that it does not act on the specific pathogen. It works equally to keep all types of pathogens such as bacteria, viruses, parasites et cetera out of the body.

The first line of defense includes physical barrier which prevents the entry of pathogens into the body. It includes skin, respiratory tract, gastrointestinal tract, cilia, nasopharynx, eyelashes, and body hairs.

It also includes chemical barriers such as mucus, gastric acid, bile, tears, sweat,  and saliva.

The second line of defense includes anti-inflammatory responses, fever, and nonspecific cellular responses such as phagocytes, macrophages, complement system et cetera.

Thus, the virus has to pass physical, chemical, and nonspecific cellular responses of the body in order to infect the body.

You might be interested in
Difference between specialist and generalist species and their niches?? Example of both?? A little help please
igor_vitrenko [27]

A generalist species is able to survive in a wide variety of environmental conditions and can make use of lots of different resources. Generalist species have a big niche. Humans, rabbits, house flies, and raccoons would all fall under the generalist species list.

A specialist species can only thrive is a small variety of environmental conditions and/or only has a limited diet. Specialist species have a small niche. Pandas, koalas, and salamanders would all fall under the specialist species list.

3 0
3 years ago
Good things to say about the wright brothers in a presentation
Goryan [66]

Wilbur and Orville Wright were American inventors and pioneers of aviation. In 1903 the Wright brothers achieved the first powered, sustained and controlled airplane flight; they surpassed their own milestone two years later when they built and flew the first fully practical airplane.

5 0
2 years ago
Identify one air pollutant released from the combustion of coal.
skelet666 [1.2K]

Answer:

Air and noise pollution can occur both indoors and outdoors. They can have natural sources or be released from anthropogenic sources. Scientists have found different ways to reduce the amount of sulfur dioxide released from coal-burning power plants. ... another option is to wash the coal to remove some of the sulfur.

Explanation:

Sulfur Dioxide

6 0
2 years ago
If it were not for the __________, osteocytes in the outer lamellae of an osteon would not be able to transport their wastes to
lora16 [44]

Answer:

canaliculi

Explanation:

According to my research on studies by various medical professionals, I can say that based on the information provided within the question the term being mentioned is called the canaliculi. This is a small channel that link together the lacunae and whose main function is routing nutrients to osteocytes and expelling waste products.

I hope this answered your question. If you have any more questions feel free to ask away at Brainly.

6 0
2 years ago
Define population density as a<br> mathematical equation.
kvasek [131]

Answer:

The formula for calculating population density is Dp= N/A. In this equation, Dp is the density of population, N is the total population as a number of people, and A is the land area covered by that population.

Explanation:

a statistic that tells you how many people live in a certain area. ... density is reported in square miles or kilometers, and may or may not include bodies of water. This type of measurement is called arithmetic density, and is reported as the total number of people per land.

4 0
3 years ago
Other questions:
  • The exchange of gas that takes place between the respiratory system and the outside airthat is, the exchanges that happen while
    10·1 answer
  • How many amino acids do we have in our bodies?
    11·1 answer
  • Explain what takes place in each step of the diagram
    8·1 answer
  • Which system is the digestive system least connected to?
    15·2 answers
  • Explain the importance of fossils and how they provide evidence for evolution.
    5·1 answer
  • The Black Death killed 30-50% of the people in every part of Europe. Why do you think such a devastating disease did not kill ev
    11·1 answer
  • How is an enzyme related to its substrate?
    11·1 answer
  • What role do wolves play in the tundra ecosystem?<br> producer<br> predator<br> prey<br> decomposer
    8·2 answers
  • Describe ways in which HIV can be transmitted​
    15·1 answer
  • Ms. C has recently received a heart transplant. Unfortunately, she is producing large quantities of antibodies against antigens
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!