Question

how respiratory system in human being works, detailed answer.
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Answer 1

Answer:

Respiratory system is used breakdown food and take energy in the form of atp

Answer 2

Answer:

All the respiratory organs have three common features:

# All the respiratory organs have a large surface area to get enough oxygen.

# All the respiratory organs have thin walls for easy diffusion and exchange of respiratory gases.

# All the respiratory organs like skin gills, and lungs have a rich blood supply for transporting respiratory gases.

# Terrestrial animals can breathe the oxygen in the atmosphere, but animals that live in water (aquatic animals) need to use the oxygen dissolved in water.

# Since the amount of dissolved oxygen is fairly low compared to the amount of oxygen in the air, the rate of breathing in aquatic organisms is much faster than that seen in terrestrial organisms.

Respiration in human

In human beings, many organs take part in the process of respiration. These organs are called organs of respiratory system.

# The main organs of human respiratory system are: Nose, Nasal passage, Trachea (wind pipe), Bronchi, Lungs and Diaphragm.

# The human respiratory system begins from the nose. The air then goes into nasal passage. The nasal passage is lined is lined with fine hair and mucus.

# When air passes through the nasal passage, the dust particles and other impurities present in it are trapped by nasal hair and mucus so that clean air goes into lungs.

# The part of throat between the mouth and wind pipe is called pharynx.

# From the nasal passage, air enters into pharynx and then goes into the wind pipe. Trachea does not collapse even when there is no air in it because it is supported by rings of soft bones called cartilage.

# The trachea runs down the neck and divides into two smaller tubes called bronchi at its lower end.

# The bronchi are connected to the two lungs.

# The lungs lie in the chest cavity or thoracic cavity which is separated from abdominal cavity by a muscular partition called diaphragm.

# Each bronchus divides in the lungs to form a large number of still smaller tubes called ‘bronchioles’.

# The pouch-like air sacs at the ends of the smallest bronchioles are called alveoli.

# The walls of alveoli are very thin and they are surrounded by very thin blood capillaries.

# It is in the alveoli that gaseous exchange takes place.

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