Question

needs assistance with biology 2

- Chapter 28829 3e (1) [Compatibility Mode] - Word Tell me what you want to do nces Mailings Review View Help FEFLECTION 6: CHAPTERS 27 & 28 NAME: LLEN Chapter 28: Respiratory System 11. Match the following definitions to the following terms they describe: (Diaphragm, Pharynx, Trachaea, Bronchi, Larynx, Alveoli, Broncheole) _: The throat The opening to the lower respiratory tract; also known as the voice box. : A large airway leading to the lower respiratory tract. Two airways that branch from the trachea that lead into each lung. _: Smaller airways that branch from the bronchi. Air sacs in the lung across which gases diffuse between air and blood. : A sheet of muscle that help in breathing by contracting and relaxing. 12. Label the major structures of the respiratory system. (Pharynx, Trachaca, Bronchi, Larynx, Alveoli, Broncheole, lung) The structures are:

Answer 1

a) PHARYNX - the throat

b) LARYNX - the opening to the lower respiratory tract, also known as the voice box

c) TRACHEA- a large airway leading to the lower respiratory tract

d) BRONCHI - to Airways that branch from the trachea that lead into each lung

e) BRONCHIOLES - smaller Airways that branch from the bronchi

f) ALVEOLI - air sacs in the lungs across which gas diffuse between air and blood

g) DIAPHRAGM - a sheet of muscle that helps in breathing by contracting and relaxing.

THE STRUCTURES OF THE RESPIRATORY SYSTEM ARE

A. PHARYNX

B. LARYNX

C. TRACHEA

D. BRONCHIOLES

E. BRONCHI

F. LUNGS

THE RESPIRATORY SYSTEM

Respiratory system in humans begins from the upper Airways or upper respiratory tract which includes the nose and nasal passages, the pharynx and the portion of the larynx that is the voice box.

The lower Airways or lower respiratory tract includes the portion of the larynx below the vocal folds, the trachea, bronchi and bronchioles.

The alveoli are clusters of tiny chambers called as air sacs. A network of blood capillaries surround the wall of the alveolus. The most important function is exchange of gases, that is Oxygen and carbon dioxide through the extremely thin wall all of the alveoli. Exchange of gases takes place through diffusion. Oxygen from air first dissolved in a thin layer of water fluid and then covers the surface of alveoli.

The lungs provide a very large surface area for alveoli.