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
Some individuals have a condition in which their bodies are unable to properly produce the protein myosin. What is one likely ef
Trava [24]

Answer:

Chronic Kidney Disease - Learn about the causes, symptoms, diagnosis ... Chronic kidney disease is a slowly progressive (months to years) decline in the kidneys' ability ... the kidneys cannot absorb water from the urine to reduce the volume of urine ... in the blood can damage nerve cells in the brain, trunk, arms, and legs

5 0
3 years ago
Read 2 more answers
Arrange the rock layers from oldest to youngest re-examine The rock outcrops if you need to. Record the order in the student gui
ira [324]

Answer:

Youngest to Oldest

Shale with ammonite

Limestone with unknown fossil

Basalt

Sandstone with trilobite

3 0
2 years ago
What animal looks like a flower and eats tiny fish?
STatiana [176]
Flower hat jellyfish, a native of the Southern Japan is the animals which look like a flower, due to the presence of pinstriped bell on it. It also has tentacles, to sting, catch and eat small fishes. It causes rashes on the humans if it stings them. 
3 0
3 years ago
Sperm whales, a(n) species, maintain their populations close to carrying capacity.
soldier1979 [14.2K]
The answer is K-selected.

<span>The population size of K-selected species is fairly constant in time, unlike the population size of r-selected species. r-selected species are usually bellow carrying capacity and the population size is density independent. On the contrary, K-selected species are usually near or at carrying capacity and the population size is density dependent. It can be concluded that sperm whales have K-selected populations, since they </span><span>maintain their populations close to carrying capacity.</span>

4 0
3 years ago
Read 2 more answers
Two scientists do not agree on which type of grocery bag is better for the environment.What is most likely outcome of their disa
PIT_PIT [208]

Most probably these scientists will do more studies and experiments in order to learn more about the subject. For example, if they compare plastic grocery bag with paper grocery bag it is important to investigate which one is a better resource use in the life cycles, which one is better for manufacturing or whether one of them can be reused. There are many questions about this issue.

6 0
3 years ago
Read 2 more answers
Other questions:
  • What does it mean to describe a scientist as sketptical?
    5·1 answer
  • Gametes are formed by
    12·2 answers
  • Which stage of the cell cycle involves the division of the cell’s nucleus? mitosis cytokinesis interphase replication
    14·2 answers
  • 5. If forests serve as important sinks for greenhouse gases, describe how past ice ages might have affected the concentration le
    9·1 answer
  • What are the Autotrophs in an Owl Food Web?
    7·1 answer
  • 2. What source of energy do organisms use if they don't use the sun's energy?
    12·1 answer
  • What are the answers to these 3 questions?
    11·1 answer
  • what do you observe happening to the amount of sunlight as the aquanauts go deeper and deeper into the ocean?
    8·2 answers
  • Explain the reciprocal relationship between human society and limiting factors.
    7·2 answers
  • 7. If an isotope of oxygen (O) has 1 less neutron, how many electrons does it have?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!