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
kolbaska11 [484]
3 years ago
7

Examples of natural barriers include (mark all that apply):

Biology
1 answer:
const2013 [10]3 years ago
8 0

The natural barriers include biochemical, physical, and mechanical, as well as inflammation of the body.

Natural barriers and the immune system defend the body against the species that leads to infection. The natural barriers include the mucous membranes, skin, earwax, tears, stomach acid, and mucus. Also, the usual flow of urine washes out the microbes, which enter the urinary tract.


You might be interested in
The blood cells containing hemoglobin, an iron-containing protein that transports oxygen, are called __________.
Otrada [13]
<span><span>The blood cells containing hemoglobin,  that transports oxygen (O2) to the body tissues of vertebrates, are called red blood cells.</span> Red blood cells (RBCs), are also referred to as red cells, red blood corpuscles, haematids, erythroid cells or erythrocytes<span>, (from Greek erythros for "red" and kytos for "hollow vessel"..RBCs take up oxygen in the lungs and release it into tissues while squeezing through the body's capillaries.</span></span>

<span> </span>

7 0
3 years ago
Helps scientist study our universe and galaxies.
qwelly [4]

Answer:

D.) both a and c

Explanation:

Past observations made early in history as well as telescopes and space probes are very important in studying our universe and galaxies.

  • Space probes are increasingly gaining momentum as technological and scientific advancements are being made.
  • Telescopes are used to see or picture objects that are very far away in space.
  • Also, understanding the past records and historical data is essential for the study of the universe.

Microscopes are not used in galactic studies. They are only used to study the world of micro-organisms.

5 0
3 years ago
Sticky mucus that lines the body's interior tubes and cavities contains _____, an enzyme that kills bacteria.
Andrej [43]

Answer:

Answer is

C) Lysozyme

this is an enzyme that kills bacteria

3 0
4 years ago
Read 2 more answers
Why are people scared of germs
lara [203]

Answer: What kinda question is that

Explanation:

8 0
3 years ago
Read 2 more answers
A Conversation between characters in a story
barxatty [35]

It's "Dialogue"

have a good day!

4 0
3 years ago
Other questions:
  • Mona is a 20-year-old student. mona is training to be a professional gymnast. she often restricts her diet to salads and fruit j
    15·2 answers
  • Suppose only one gene with 2 alleles determines a particular trait but the alleles are codominant. how mant different phenotypes
    6·1 answer
  • Science help please and fast
    13·1 answer
  • "what is the most frequently fatal health effect among those who suffer from an eating disorder
    6·1 answer
  • If a gamete contains 5 chromosomes, how many chromosomes will a typical body cell contain? does the number of chromosomes change
    9·1 answer
  • Hurricanes die when they move over land because
    13·1 answer
  • Carbon dioxide, water vapors, methane, and ozone in the atmosphere result in a The greenhouse effect b Acid rain C Photoionizati
    13·1 answer
  • Would a volcanic eruption affect Earth’s climate?Justify your response.
    8·1 answer
  • The network of connective tissue fibers which pass through the tissues of the body and allow for the efficient movement of immun
    7·1 answer
  • Explain how a single allele can exhibit both complete dominance and codominance?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!