Thursday, 29 November 2018
Tuesday, 20 November 2018
Friday, 9 November 2018
Thursday, 8 November 2018
Monday, 22 October 2018
Tuesday, 16 October 2018
Thursday, 4 October 2018
RESPIRATORY SYSTEM
THE
RESPIRATORY SYSTEM
It
absorbs oxygen into the body and releases carbon dioxide. The lungs
and the trachea are organs of the respiratory system.
There
are two processes involved in respiration: pulmonary ventilation and
gas exchange.
- PULMONARY VENTILATION is the movement of air into and out of the lungs. This process is performed by two movements inspiration and expiration.
- GAS EXCHANGE take place in the alveoli.During this porcess, oxygen from the outside air passes into your blood and carbon dioxide which is in the blood passes to your lungs and leaves your body.
Now, it is time to have a look how respiration is performed.
Friday, 28 September 2018
DIGESTIVE SYSTEM
THE DIGESTIVE SYSTEM
It breaks food we eat into smaller molecules that our body can absorb. The stomach and the intestines are organs of the digestive system.
There are 3 stages in the digestive process:
- DIGESTION: it is the set of changes to food as it travels along the digestive tract. The objective is to transform food into nutrients.
- ABSORPTION: in the absorption stage the nutrients pass to the blood through capillaries which are found in the villi in the small intestine walls.
- EXCRETION: the final stage of the digestive process includes the preperation and elimination of the part of our food that our body does not need.
Let's see how food travels inside your body
Friday, 21 September 2018
PRESENT CONTINUOUS - Theory and practice
PRESENT CONTINUOUS
We use present continuous to talk about something is happening right now.
In affirmative it is formed by:
subject + verb to be + verb -ing
Now you have another explanation of present continuous in order to make things easier.
And here, there are some games to have a little fun
Sunday, 16 September 2018
UNIT 1 - INVERTEBRATES II
ARTHROPODS
Characteristics
Characteristics
- They live everywhere: on land , in the air and in the water.
- It is the biggest group of invertebrates.
- They all have external skeleton to protect their body.
- They all have many jointed legs.
- The body is divided into segments.
- They can be herbivores, carnivores or omnivores.
- Insects: It is the biggest group of arthropods. Their body is divided into 3 parts (head, thorax and abdomen). They have two antennae. They can have wings.
- Arachnids: Their body is divided into two parts cephalothorax (head and thorax together)and abdomen. they don have antennae or wings.
- Crustaceans: The majority of crustaceans have a body divided into two parts: cephalothorax and abdomen. They have two antennae and don't have wings.
- Myriapods: they have more than 10 legs
SPONGES
Characteristics:
- They live at the bottom of the sea
- They are fixed to the ground. They can't move around.
- Their body is full of holes called pores (pores are used to get water and food).
JELLYFISH
Characteristics:
- They live in the sea. They can be very dangerous.
- They have poisonous tentacles that they use to hunt other animals or to defend themselves.
ECHINODERMS
Characteristics:
- They are starfish and urchins belong to this group of invertebrates.
- They have many small feet that they use to move along the bottom of the ocean.
MOLLUSCS
Characteristics:
- They can live in water or in land
- They have a soft body and the majority have a shell.
- There are 3 types of molluscs: with one shell (snails), with two shells (mussels) or with internal shell (squid).
WORMS
Characteristics:
- They can live in water or in land.
- They have a long soft segmented body made up of rings.
UNIT 1 - INVERTEBRATES
Invertebrate animals
do not have an internal skeleton (backbone) and they are all
oviparous (they all reproduce laying eggs).
Let's know something more about invertebrates such as the characteristics or the classification.
Subscribe to:
Posts (Atom)