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
Vladimir79 [104]
2 years ago
7

In 3-5 sentences, describe the human respiratory system and its functions.

Biology
1 answer:
Liula [17]2 years ago
5 0

Answer:

The respiratory system is a biological system consisting of specific organs and structures used for gas exchange in animals and plants. The anatomy and physiology that make this happen varies greatly, depending on the size of the organism, the environment in which it lives and its evolutionary history. In land animals the respiratory surface is internalized as linings of the lungs. Gas exchange in the lungs occurs in millions of small air sacs called alveoli in mammals and reptiles, but atria in birds. These microscopic air sacs have a very rich blood supply, thus bringing the air into close contact with the blood. These air sacs communicate with the external environment via a system of airways, or hollow tubes, of which the largest is the trachea, which branches in the middle of the chest into the two main bronchi. These enter the lungs where they branch into progressively narrower secondary and tertiary bronchi that branch into numerous smaller tubes, the bronchioles. In birds the bronchioles are termed parabronchi. It is the bronchioles, or parabronchi that generally open into the microscopic alveoli in mammals and atria in birds. Air has to be pumped from the environment into the alveoli or atria by the process of breathing which involves the muscles of respiration.

Explanation:

You might be interested in
Which molecule are the condons found on?
patriot [66]

heir function is to base pair with the codon on a strand of mRNA during translation. This action ensures that the correct amino acid will be added to the growing polypeptide chain. A tRNA molecule will enter the ribosome bound to an amino acid.

4 0
3 years ago
When Charles Darwin considered wings of birds, he famously propose 1 ): Google. hhmi biointeractive great transition heime 17:28
serg [7]

When Charles Darwin considered wings of birds, apart from his famous proposal he also predicted that fossils will be found with structures that are intermediate between early and modern form.

Answer: Option C

<u>Explanation:</u>

Charles Darwin was basically referring to transitional Fossil while considering Wings of bird. So what are transitional fossil? They are the fossil remains of both the ancestral group and the descendant group.  

Since we don’t have enough record of the fossils, it is very difficult to know the accuracy of transitional fossil.  However, we do have some record of fossils from which we can gather enough evidence of how the fossils where earlier and how it evolved over a period of time.  

7 0
3 years ago
What does each person do just before becoming infected?
vlada-n [284]

I would think they would probably hide from the people that are infected.

7 0
2 years ago
Read 2 more answers
What part of the nervous system is essential for it to work properly?
Gekata [30.6K]
Brain. :) that's your answer haha
8 0
3 years ago
Cathy's favorite salad dressing is a liquid with particles of salt, pepper, and garlic. When comparing a spoonful of salad dress
Gre4nikov [31]

Answer:

Liquid equivalent to "cytoplasm" and the particles equivalent to "organelles".

Explanation:

While comparing a liquid salad dressing to a cell, the liquid will be equivalent to "cytoplasm" because cytoplasm is a thick solution present in each cell that made up of water, salts, and proteins.

The particles would be equivalent to "organelles" because as particles float in liquid salad adding flavours to the salad likewise organelles are present in a cell floating in the cytoplasm that performs a specific function.

Hence, the correct answer is " liquid will be equivalent to "cytoplasm" and the particles will be equal to "organelles".

7 0
2 years ago
Other questions:
  • Is a fat replacer used in food processing that can bind to fat-soluble vitamins and thereby reduce their absorption?
    10·1 answer
  • The pacific plate is an oceanic tectonic plate. How much did a hot spot and the pacific plate interact to form the Hawailan isla
    11·2 answers
  • which condition is a population that descended from a small number of common ancestors more likely to have
    15·1 answer
  • Dinobryon is a species of protozoa that reproduces asexually. How is it better for the survival of the species for the protozoa
    10·1 answer
  • Three lots with parallel side boundaries extend from the avenue to the boulevard as shown answer
    10·1 answer
  • A bird flew and landed on its swing. When the bird "hit" the swing, the swing began to move back and forth. What happened when t
    15·1 answer
  • In which specimen were cells first identified?
    10·1 answer
  • Help please help!!!!
    5·1 answer
  • Which will form as ionic bond
    14·1 answer
  • Which of the following statements about autosomal recessive traits is true?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!