Quarter 1: Lesson 1

Question 1

made up organs in our body that help us breathe.

Answer 1

Respiratory System

Question 2

It is common to both plants and animals. In this process, there is an exchange of oxygen and carbon dioxide.

Answer 2

Respiration

Question 3

exchange of gasses between the atmosphere and blood. This involves the lungs.

Answer 3

External Respiration

Question 4

exchange of gasses between the cells of the body and the blood.

Answer 4

Internal Respiration

Question 5

is a mechanical process that helps get air in and out of the lungs. It consists of two stages.

Answer 5

Breathing

Question 6

intake of oxygen

Answer 6

Inhalation

Question 7

breathing out of carbon dioxide

Answer 7

Exhalation

Question 8

Upper Respiratory Tract

Answer 8

Nose, Pharynx, Larynx

Question 9

gateway and the first organ of the respiratory system wherein the air (oxygen) enters the body. It is responsible for the sense of smell and helps in respiration and speech production.

Answer 9

Nose

Question 10

also called “nares”. These are the external openings in the nose and serve as the passage of air into the body.

Answer 10

Nostrils

Question 11

inside part of the nose. It warms, moisturizes, and filters the air that enters the body. It is lined with a mucous membrane that helps keep the nose moist by producing mucus.

Answer 11

Nasal cavity

Question 12

tiny hairs that are located on the surface cells of the mucous membrane that moves back and forth. The mucus traps any foreign particles which are moved by the cilia toward the front of the nose. This helps clean the air before it goes to the lungs.

Answer 12

Cilia

Question 13

lines the nasal cavity. It produces mucus that is moist and sticky that captures dust, germs, and small particles that could irritate the lungs.

Answer 13

Mucous Membrane

Question 14

passageway of air from the oral and nasal cavities to the lungs, it is also the passage of food to the esophagus.

Answer 14

Pharynx or Throat

Question 15

located in the pharynx which plays an important role to protect the body from infection.

Answer 15

Adenoids and tonsils

Question 16

a hollow tubular structure that connects the pharynx and the windpipe (trachea). It is where the vocal folds or vocal cords lie and prevents the passage of food and other foreign particles in the lower respiratory tracts.

Answer 16

Larynx or Voice Box

Question 17

leaf-shaped flap cartilage behind the tongue which protects the trachea during eating to prevent inhalation of food.

Answer 17

Epiglottis

Question 18

Lower Respiratory Tract

Answer 18

Trachea, Lungs, Bronchi, Bronchioles, Alveoli, Diaphragm

Question 19

a cartilaginous tube that connects the larynx to the bronchi of the lungs. It serves as a passageway of air, moistens, and warms while it passes into the lungs.

Answer 19

Trachea or Windpipe

Question 20

it is the primary organ of the respiratory system. The lungs are protected by a bony and muscular rib cage and a double-layered membrane (pleura) that lines the thoracic cavity and covers the lungs. They help the oxygen we breathe enter the red blood cells and get rid of carbon dioxide when we breathe out.

Answer 20

Lungs

Question 21

two branches that split from the trachea and lead directly to the lungs

Answer 21

Bronchi

Question 22

are small bronchial tubes that deliver air to alveoli.

Answer 22

Bronchioles

Question 23

tiny air sacs like grapes located at the end of the bronchial tubes and are surrounded by blood capillaries. It is the endpoint of the respiratory system.

Answer 23

Alveoli or Air sacs

Question 24

The gas exchange of oxygen and carbon dioxide happens between the alveoli (singular, alveolus) and blood by the process of __________

Answer 24

diffusion

Question 25

a dome-shaped structure that separates the chest and abdomen. It is the main respiratory muscle responsible for inhalation and exhalation.

Answer 25

Diaphragm

Question 26

the lungs expand and the diaphragm moves downward.

Answer 26

During inhalation

Question 27

the diaphragm relaxes and returns to its normal shape.

Answer 27

In exhalation