The bronchial 'tree':
The pharynx is the trunk. The primary bronchi are the first two large branches. They branch to form tertiary bronchi.
Each tertiary bronchus branches into multiple bronchioles, which branch further into the very smallest conducting branches, the terminal bronchioles.
The terminal bronchiole branches to form several respiratory bronchioles, where gas exchange takes place.
Bronchioles.
Endoplasmic Reticulum.
Well when you are inside or in a low lighted area your pupils get bigger, but when you outside when its bright your pupils get smaller.
No, chromosomes are smaller than cells. Chromosomes are found in the nucleus of cells which codes for the synthesis of proteins.
Each bronchiole ends in a cluster of air sacs called alveoli. In the alveoli gases are exchanged during respiration. bronchus(bronchi-plural) held open by cartilage, they convey air into each lung. The bronchi are lined with mucous membrane and ciliated cells which trap and help in the removal of any dirt and dust that enters
Gas exchange occurrs in all organisms, but judging by the category this question placed in, I am making the assumption that this question is asking about gas exchange in humans. Humans use lungs for gas exchange. The lungs are two internal "sac-like" organs. The lungs are able to expand and contract becuase of the alveoli. Alveoli are small cavities/air sacs in the lungs. The lungs are connected to the outside air by way of a system of tubular passageways; the trachea, bronchi and bronchioles. Each lung is divided into a number of lobes, each recieving its own bronchus. Each bronchus divides many times into bronchioles, which then end in many alveole ducts and alveoli. These provide a very large surface area for the exchange of respiratory gases by diffusion betweent he alveoli and the blood in the capillaries. Gas exchange occurs in two stages of ventillation, called inhilation and exhilation. Inhilation is when the intercostal muscles contract, which causes the ribcage to expand and move up, and the diaphragm then contracts and moves down. This action causes the thoraic voume to increase, which allows the lungs to expand and this decreases the pressure inside them. Air is then pulled in from the atmosphere is response to this pressure gradient. The cardiovascular system then participates by transporting the respiratory gases to and from the cells of the body. In the second stage of ventilation, exhilation, the intercostal muscles and diaphragm relax. and gravity pulls the ribcage down. The lungs then recoil, which decrease the volume inside and therefore increases the pressure. The air then flows out of the lungs to equalize with the air pressure outside of the lungs, and with it we release carbon dioxide. So to summarise: We breathe in O2 when the lungs expand, and we release CO2 when the lungs contract.
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The bronchi are passages that direct air into the lungs, which are the main organs of the respiratory system. Inside of the lungs, each bronchus divides into smaller and smaller tubes, resembling the branches of a tree. At the end of the tubes are the alveoli, which are the tiny sacs of lung tissue specialized for the movement of gases between air and blood.
It is called the delivery system.
Trachea divides in 2 bronchi which conducte air into the lungs (inside the lungs each bronchi divides in many smaller branchs only studied in college)
Endoplasmic Reticulum.
Event Horizon
Breathing in humans involves the inhalation of oxygen-rich air into the lungs through the nose or mouth. The diaphragm and intercostal muscles expand the chest cavity to create negative pressure, drawing air into the lungs. During exhalation, these muscles relax, causing the chest cavity to decrease in size and expel carbon dioxide-rich air from the lungs.
Bronchitis is most often viral, and so there is no cure. It normally resolves within weeks with supportive treatment.
abnormal chloride channels that trap salt inside cells lining the lung passageways.
Sex Game
A cell nucleus would be smaller than a cell because a cell nucleus is inside the cell, so it has to fit inside.