Gaseous exchange in humans (the structure)

Question 1

What are the small hairs of the nasal cavity do?

Answer 1

they filter out large particles from the inhaled air

Question 2

Name the membrane that the nasal cavity is lined with

Answer 2

mucous membrane

Question 3

what does the mucous membrane consists of ?

Answer 3

a ciliated columnar epithelial cell

Question 4

function of the Ciliated columnar epithelial cell

Answer 4

is richly supplied with superficial blood capillaries that provide warmth for the incoming air

Question 5

what is in the ciliated columnar epithelial cell that secretes mucus

Answer 5

Goblet cells

Question 6

why do the Goblet cells secrete mucus

Answer 6

to trap dust and germs

prevent inhaled germs from Multiplying

moistens and warms incoming air

Question 7

the function of the cilia

Answer 7

sweep out the dust carrying muscus

Question 8

What does the pharynx do ?

Answer 8

Leads to two openings

Question 9

What two openings does the pharynx lead to

Answer 9

Glottis (trachea)

Gullet (oesophagus)

Question 10

What is the pharynx lined with

Answer 10

Mucous membrane

Question 11

Trachea , where is it?

Answer 11

In front of the Oesophagus

Question 12

Where is your voice box ,located ?

Answer 12

On top of the trachea

Question 13

what is the larynx made out of

Answer 13

Cartilage

Question 14

What is the thin leaf shaped structure made of cartilage?

Answer 14

Your Epiglottis

Question 15

What does the Epiglottis do

Answer 15

It closes the glottis (the opening of the trachea) ,during the swallowing process

Question 16

Why does the Epiglottis have to close the glottis during the swallowing process?

Answer 16

To prevent food from entering the trachea and you choking

Question 17

Discuss the structure of the trachea

Answer 17

Reinforced, kept open by C shaped cartilage rings

Question 18

Why are the openings of the C shaped cartilage rings covered by an involuntary muscle tissue

Answer 18

To allow the oesophagus to expand as food moves food moves down through it

Question 19

What is the trachea lined with

Answer 19

Mucous membranes

Question 20

What does the trachea later divide into ?

Answer 20

Right and Left bronchi

Question 21

What are the bronchi lined up with ?

Answer 21

Mucous membranes

O shaped cartilage

Question 22

What are the small branches bronchi divide into

Answer 22

Bronchioles

Question 23

What are the lungs surrounded and protected by

Answer 23

12 pairs of ribs

Question 24

What muscles are found between the ribs and the lungs

Answer 24

Intercostal muscles

Question 25

Explain the texture of the lungs

Answer 25

Spongy and elastic

Question 26

What membrane are the lungs surrounded by

Answer 26

Pleura

Question 27

What is the membrane between the 2 pleural membrane that prevents friction that occurs when the lungs shrink or expand

Answer 27

Interpleural fluid

Question 28

What is the very thin wall that consists of a single layer

Answer 28

Squamous epithelium

Question 29

Why do the Bronchioli eventually end in millions of alveoli

Answer 29

increase the gaseous exchange

Question 30

Why does the wall of an alveolus consists if a single layer squamous epithelium

Answer 30

Thin surface for efficient gaseous exchange

Question 31

Why is the Aveoli surrounded by a network of blood capillaries

Answer 31

Transport if O2 to the tissues and Co2 to the lungs

Question 32

Walls if the blood capillaries consist of a single layer it ednothelium

Answer 32

For efficient gaseous exchange

Question 33

Inhalation

Answer 33

Air moving from the environment into the lungs

Question 34

Exhalation

Answer 34

Air moves from the lungs to the environment

Question 35

What process is inhalation

Answer 35

Active process

Question 36

What process is exhalation

Answer 36

Passive process