SECOND TERM. UNIT 1: BODY SYSTEMS. INTRODUCTION

NUTRITION:

Circulatory system.
Respiratory system
Digestive system
Excretory system

INTERACTION:

Nervous system

REPRODUCTION:

Male system
Female system

VOCABULARY:
heart, lungs, arteries, veins, nutrients, blood, lungs, bronchi, waste, sweat, urine, kidneys, bladder...

Verbs: to clean, to breathe in, to breathe out, to be made up of, to break down, to leave...

SECOND TERM_Unit1_NUTRITION: Digestive System

Digestion:

1. The sense of smell provokes the production of saliva in the mouth.

2. We swallow* the food into the oesophagus, a tube that links* the throat with the stomach.

3. The stomach breaks down* food excreting gastric juices.

4. The food becomes a liquid and mixes with bile (produced by the liver) and pancreatic juices. Nutrients are absorbed into the blood*.

5. The waste* passes to the large intestine. Water is absorbed into the blood. Solid waste leaves the body through the anus.

*to swallow: to take food or liquid down the throat

to link: to join or to connect

to break down: to disintegrate a substance 

blood: red liquid that flows throughout the body

wastes: garbage, excrements