THE HUMAN BODY AND NUTRITION

ALBERTO SERNA RAMÍREZ 6º DE PRIMARIA

UNIT 2

WHAT DO WE NEED TO FUNCTION?

WHAT DO WE NEED TO FUNCTION ?

THE ROLE OF NUTRITION:

NUTRIENTS OXYGEN

COVERTED INTO ENERGY

THE BODY EXPULSE WASTE SUBSTANCES

NUTRITION IN CELLS

WASTE SUBSTANCES

OXIGEN NUTRIENTS

HOW OUR FOUR SYSTEMS WORK TOGETHER ?

THE RESPIRATORY SYSTEM

THE CIRCULATORY SYSTEM

THE EXCRETORY SYSTEM

THE DIGESTED SYSTEM

DIGESTION

EXCRETION

Preparation and elimination the waste substance.

ABSORPTION

Nutrients pass to the blood through villi and capillaries. DIGESTION

Transform food into nutrients.

THE DIGESTED PROCESS: 1º Digestion begins in your mouth. The teeth breaks down

the food and your tongue mixes it with the saliva from your salivary glands. This mixture is called bolus.

THE DIGESTED PROCESS: 2º Next, the bolus travel down the pharynx and the

oesophagus and into the stomach.

THE DIGESTED PROCESS: 3º Once in the stomach, the gastric juices breaks down the

food and form a paste called chyme.

THE DIGESTED PROCESS: 4º In the small intestine, chyme mixes with other juices

from the pancreas, liver and small intestine itself to form chyle.

THE DIGESTED PROCESS: 5º Chyle travel to the blood vessels .

THE DIGESTED PROCESS: 6º The bad nutrients is called waste substances travel

through large intestine and it´s expelled through the anus.

RESPIRATION

GAS EXCHAGEYou have alveoli, it´s here that gas exchange occurs.

2 MOVEMENTS OF PULMONARY RESPIRATION

Inspiration Expiration TWO PROCESSES INVOLVED IN RESPIRATION :

Pulmonary respiration Gas exchange

THE RESPIRATORY PROCESS: 1º The respiratory process begins in your nose. Air enters

the body through nostrils.

THE RESPIRATORY PROCESS: 2º The air travels down through the larynx, the windpipe, the bronchi and the bronchioles, and finally reaches the

lungs.

THE RESPIRATORY PROCESS: 3º Gas exchange takes place in the alveoli.

THE HEART

HOW YOUR BLOOD MOVES AROUND YOUR BODY: Pulmonary circulation General circulation

THE HEART PUSH BLOOD AROUND THE BODY THROUGH BEATING:

Systole contracts. Diastole relaxes.THE HEART IS MUSCULAR ORGAN WITH 4 CHAMBERS:

2 Atria: left and right. 2 Ventricles: left and right.

CIRCULATION

3 TYPES OF BLOOD VESSELS : VEINS CAPILLARIES ARTERIES

3 TYPES OF BLOOD CELLS :

RED BLOOD CELLS PLATELETS WHITE BLOOD CELLSPLASMA

Is the fluid which your blood cells float in.

BLOOD COMPONENTS

PLATELETS: It´s function is to heal wounds and form clots.

WHITE BLOOD CELLS:

Defend your body from viruses and bacteria.RED BLOOD CELLS:

Transport oxygen and nutrients.

EXCRETION

SWEAT GLANDSSweat is a mixture of water and waste substances.

THE PARTS OF THE EXCRETORY SYSTEM :

1º Kidneys 2º Ureters 3º Bladder 4º UrethraCONSISTS OF THE URINARY SYSTEM AND SWEAT GLANDS

Filtered waste substances Expulse sweat out of our body

THE end