Report of :

Roma Oclares

--is a life process common to both plants

and animals.

-- In this Process, there is an

exchange and carbon dioxide.

-- In our body, oxygen continuously

supplied to your body cell and is

transported through your bloodstream.

-- is then used to oxidize

or “burn” food materials in

every living cell.

-- After cellular breakdown

of food, carbon dioxide is

released by cell.

-- This gaseous waste is again

picked up by your blood and is

expelled from your body system.

1. Oxidation of food by living cell.

2. Transport of oxygen to the cells and the removal of carbon

dioxide from lungs.

3. Exchange of gases between your blood and lungs.

4. The breathing process.

Your Respiratory System allows the

exchange of gases to occur with two

important phases involves :

EXTERNAL RESPIRATION and

INTERNAL RESPIRATION

External respiration

-- is the

exchange gases

between the

atmosphere and

the blood. This

involves the

lungs.

Internal respiration

-- is the exchange

of gases between

the blood and the

body tissues. It

occurs in every

living cell.

-- In External respiration, oxygen from the air goes into your lungs through the respiration tract. In your lung capillaries, oxygen joins your blood. At this point, the level of oxygen is higher in the alveoli of your lungs.

The blood that leaves your lungs is

called oxygenated blood. The blood

entering your lungs is said to be

deoxygenated blood.

♫ is a mechanical process that helps get air in and out of the lungs.

♫ it consist of two stages :

♪ Life depends on breathing because the body cells need oxygen.♪ Oxygen is one of the mixtures of gases found in air♪ During inspiration, you breath in or inhale to bring fresh supply of air into your lungs.♪ During expiration, you breathe out or exhale to get rid carbon dioxide or waste gases not needed by your body.♪ They are then expelled to relieve your body cells of wastes.

Infants – 30 to 40 times a minute.Six years old – about to slows down 22 times a

minute.Your age until your about 25 – further slowed

down about 16 to 18 times a minute.

- An exception when you are an athlete or when you engage a hard

work.- Your Breathing rate such cases will be

higher.

a. Air enters to your nose. The nostril serve as entrance to your nasal cavities. They are a pair of passage separated by a

bony septum.b. Inside the right and left nasal cavities are coarse hairs that filter the air and trap any microorganism or dust

T H E L U N G S

∞ Your Lungs occupy twin cavities,

one at each side of the chest.

∞ They separated by your heart,

blood vessels, and your

esophagus.

∞ Each of Lungs is large enough to

fill the pleural division of the

thoracic cavity.

∞It is cone-shaped with its base

pointing downward, resting on the

diaphragm, or sheet of muscle,

below.

∞The top, or apices, on the other

hand, bulge upward.

Your left lung is slightly smaller

than your right.

It has two main division or lobes

while the right lung has three.

Your lungs are spongy and are covered by a double pleural membrane which secretes mucus.

The mucus acts as a lubricant, permitting the lungs to move freely in the chest during breathing.

Your lungs fit into a box-like space. At the bottom of the

is a process by which waste materials from

the oxidation of food cell in cell metabolism

are removed from living cells.

Carbohydrates breakdown produce

carbon dioxide and water as its waste

products.

These are removed from the body through

the lungs during expiration

Other excretory organ which you have already studied are you liver which forms urea

and biles.

-- Your skin which

excretes water,

salts and urea in

the form of sweat.

-- Your Large

Intestine, an

organ that

removes feces.

-- is a nitrogenous waste

substances found chiefly in the

urine mammals.

-- another nitrogenous waste products of cell activity, is

insoluble and is mainly found among land animals.

The excretory process ---Its parts and function

lower forms of animals, especially one-celled organisms, expel their cells waste products directly into their

environment.

In some protozoan's, excretory processes occur almost similarly.

Euglena expels food materials through the cell membrane.

Amoeba retains undigested food particles in a vacuole and later passes them out at any point in its ccell

membrane