Nutricion

Colegio Ntra. Sra. de Lourdes

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Biology and Geology 3º ESO

OVERVIEW: NUTRITION
DIGESTIVE SYSTEM
RESPIRATORY SYSTEM
CIRCULATORY SYSTEM
EXCRETORY/URINARY SYSTEM

OVERVIEW: NUTRITION
AN IMPORTANT CONCEPT
Metabolism is the biochemical modification of chemical compounds in living organisms and cells.
This includes biosynthesis of complex organic molecules (anabolism)and their breakdown
(catabolism)
Metabolism usually consists of sequences of enzymatic steps, also called metabolic pathways.
The total metabolism is all the biochemical processes of an organism.
The cell metabolism includes all chemical processes in a cell.
SYSTEMS INVOLVED

Faeces

D
i
G Complex
E nutrients
S
T
Solid
I
V
waste
E

Nutrition process
Air in

Oxigen
O2

TR Simple
A
C nutrients
T

Air out
R
E
S
P
I
R
A
T
O
R
Y

A
P
P
A
R
A
T
U
S

Waste
E
X
C
R
E
T
O
R
Y

Carbon
dioxide
CO2

S
Y
S
T
E
M

Waste
Urine and
sweat

CELL
Cellular metabolism

Nutrients

O2

Material elaborado por Rosalía Pidre Niño

CIRCULATORY
APPARATUS

CO2

Waste
(urea)
1

Colegio Ntra. Sra. de Lourdes

Biologyand Geology 3º ESO

DIGESTIVE SYSTEM: ANATOMY
DIGESTIVE SYSTEM ACTIVITY, LISTEN TO YOUR TEACHER’S INSTRUCTIONS (Play video)

Material elaborado por Rosalía Pidre Niño

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Colegio Ntra. Sra. de Lourdes

Biology and Geology 3º ESO

Digestive tract’s anatomy
•Parotid

Salivary glands

Teeth
Mouth
Tongue

•Sublingual
•Submandibular

Pharynx
Esophagus
Cardiac
sphincterLiver

•Fundus

Stomach

Gallbladder

•Middle
•Pylorus

Pyloric
sphincter

Large
intestine

Pancreas,
pancreatic duct

Transverse colon
Ascending colon
Sigmoid colon

Duodenum
Jejunum
Ileum

Cecum

Small
intestine

Rectum
Anal canal and anus

Appendix

Stomach and small intestine anatomy
Esophagus

Pyloric
sphincter

Pylorus

Valve that opens up intothe
small intestine

Jejunum
Small intestine middle
part

Cardiac
sphincter
Valve that opens up into the
Fundus
stomach
Middle

Stomach

Duodenum
Small intestine initial part.
It is located right after the
stomach

Ileum
Small intestine final part. It links the
large intestine

Material elaborado por Rosalía Pidre Niño

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Colegio Ntra. Sra. de Lourdes

Biology andGeology 3º ESO

DIGESTIVE SYSTEM: DIGESTION PROCESS
MECHANICAL DIGESTION

Peristaltic Movements

CHEMICAL DIGESTION
MOUTH
Saliva

Amylasa
Ptialin

STOMACH
Gastric juice

SMALL INTESTINE
Bile
Pancreatic juice
Intestinal juices

Water, mineral salts
and vitamins
Water, mineral salts
and vitamins
Glucids
Glucose
Proteins
Amino acids
Lipids
Fatty acids and
glycerolMaterial elaborado por Rosalía Pidre Niño

4

Colegio Ntra. Sra. de Lourdes

Biology and Geology 3º ESO

ABSORPTION
It happens through small intestine inner wall
Intestinal folds

Microvilli
Intestine
Villi

Glands
Blood
vessel

Lymphatic vessel

HEALTHY HABITS
WITH YOUR PARTNER TRY TO FIND OUT HEALTHY HABITS AND ALSO TRY TO NAME AND
DESCRIBE TWO ILLNESSES RELATED WITH THEDIGESTIVE SYSTEM.

Material elaborado por Rosalía Pidre Niño

5

Colegio Ntra. Sra. de Lourdes

Biology and Geology 3º ESO

RESPIRATORY SYSTEM: ANATOMY
Anatomy of the Respiratory system
Nasal cavity
Epiglottis
Pharynx
Vocal cords

Terminal bronchus:
Bronchiole

Larynx
Trachea

Lung

Sternum

Rib cage
Bronchus

Alveolar sac

Diaphragm

THE COMPOSITION OF INSPIREDAND EXPIRED AIR
INHALED AIR

EXHALED AIR

21%
17%

You needn’t learn the figures by hard.
You must notice the difference between
the figures.
0.03%
Oxygen

Material elaborado por Rosalía Pidre Niño

Carbon
dioxide

Oxygen

Carbon
dioxide

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Colegio Ntra. Sra. de Lourdes

Biology and Geology 3º ESO

HEALTHY HABITS, TOXIC SUBSTANCES AND RESPIRATORY SYSTEM PROBLEMS...