Lesson 2: Respiratory System

The process wherein food is broken down in the cells with the help of oxygen to release energy

the physical process of inhalation and exhalation wherein oxygen is obtained and carbon dioxide is expelled, respectively

waste product of cells

gas exchange occurs between the alveoli of the lungs and blood

The blood transports the oxygen from the alveoli to the cells, and carbon dioxide is transported from the cells to the alveoli

Gas exchange occurs between the blood and cells

2 types of respiratory system

The holes in your nose its is the first entry of the inhaled air

lined with mucus that traps microorganisms and other debris serves as the first line of defense against foreign invaders that may enter the body

tiny hair like structure It sweeps the trapped foreign particles out

warms the inhaled air so that its temperature comes close to the normal body temperature it also moistenes the air to make suitable for the body

also known as the throat serves as a common chamber for the inhaled air and ingested food

Three parts of pharynx

this is where a flap of tissue called

also known as voice box

also known as the windpipe

it is the entry point of the air to the lungs

The bronchi are further divided into smaller branches

at the tip of each bronchiole, there are grape like structures These are the actual site of gas exchange

The case that protects the lungs is called

The bone found on the chest at the center is called

it is surrounding the lungs

It moves down during inhalation to accommodate the inhaled air

Bone found at the dorsal side