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:
Answer:
Read the Craft and Structure notes, then read the poems in Collection 3. Following the directions listed on page 401 under "Writing to Sources" I want you to write a narrative and a lyric poem about an admirable person. Yes, I want both a narrative and a lyric poem about the same person. Do not forget to include the paragraph comparing your topic and style to one of the poems in the collection -- you can choose to examine either your narrative or lyric poem for this portion, but you do not have to do both.
This assignment is due by 3 p.m. Monday.
Explanation:
Give True Brainliest.
Answer:
Location B, because cracks between plates are filled with molten rocks which solidify
Explanation:
Location B because, as the tectonic plates move away under the sea, inside the sea are cracks of the ocean floor that releases molten rocks, or a type of liquid that hardens when interacting with liquid (thats from the mantle).
