The circulatory system transports oxygen, nutrients, hormones, and other materials to tissues and removes carbon dioxide and wastes. It consists of the heart, which is a hollow muscular organ about the size of a fist that pumps blood through the body, and a network of blood vessels - arteries, veins, and capillaries - that form a 100,000 km long system. Blood is a fluid that delivers oxygen and nutrients to cells from the lungs and heart and carries away carbon dioxide and other cellular wastes.

1. 1. Function
The circulatory system takes___________and ____________ to all
the tissues of the body.
It also picks up____________products like____________.
Then it takes them to_________that eliminate them.
2. Parts of the circulatory system
The heart is a
hollow, muscular
organ, about the
size of your fist.
The function of
the heart is
simple. It keeps
blood circulating
throughout the
body.
100,000 Km long
system through
which blood is
distributed to the
body
Fluid that delivers oxygen, hormones, and nutrients to the
cells and carries away the wastes that the cells produce.

2. 2.1 The Heart
1.What is the role of the circulatory system in the nutrition
process?
2.Write information schematically about the heart:
LOCATION FUNCTION THE TWO
HALVES
THE
CAVITIES
3.Answer these questions about the video in page 2
from the power point presentation:
- Where is the heart?
- Where is the carbon dioxide cleaned and we get
the oxygen?

3. - How many beats can our heart do in a minute
while relaxed? And if we are running?
- Why is this system called the circulatory system?
- What do arteries do? And veins?
- What is the size of the heart? And the weight?
- How many litres of blood do we have in our
body?
2.1.2 PARTS OF THE HEART:
The heart contains four open spaces called________. The
two upper chambers are the ______ _________
and the______ _________. The two lower chambers are the
________ _________ and the________ _____________.

4. 2.1.3 HOW DOES THE HEART WORK?
1. Order these sentences according to the process that the
heart does for working:
atrium or in the left atrium. Then it goes to the
of the heart.
When the ventricles contract, they push the blood out
When blood goes into the heart, it enters in the right
ventricles.
Now copy the sentences from exercise 4 in order:
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
____________________
2. Draw the main arteries of the human body and name
them on the picture.
3. Explain what are:
- ARTERIES:_________________________________________________
_______________________

5. - VEINS:______________________________________________________
_____________________
- CAPILLARIES:____________________________________________
_________________________
4. Draw the different types of blood cells, write their names
and their functions:
3. HOW DOES BLOOD CIRCULATE?
1.Watch this video and do the exercises:
http://www.cengage.com/biology/discipline_content/animati
ons/blood_circulation.html

6. 2.Complete the sentences with these words. Then answer the
questions.
inferiorleft atriumcarbon dioxidesuperior
heartlungs oxygen right atrium aorta


 What kindof circulationdoesthe textdescribe? Pulmonary/General.
Deoxygenatedbloodentersthe ________and passes
intothe right ventricle.The rightventricle pumpsthe bloodoutof
the heart throughthe pulmonaryarteriestothe _____________.
The bloodpicksup __________ and releases_______________.
The oxygenated bloodreturnstothe _________through
the pulmonaryveins.
The bloodgoesintothe ______________ and thenintothe left
ventricle.The leftventricle pumpsthe blood throughthe _________
to the rest of the organs inthe body.
In the organs, the blood picks up __________________and
releases ________________.
The _______________vena cava and the ____________vena cava carry deoxygenated blood to
the heart.

7.  What kindof circulationdoesthe picture describe? Pulmonary/General.
3.Watch the video from this link and afterwards write three
questions for your partners to answer:
https://www.youtube.com/watch?v=-s5iCoCaofc