unit 3c
TRANSCRIPT
![Page 1: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/1.jpg)
Unit 3(c): The circulatory system.
![Page 2: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/2.jpg)
Unit 3(c): The circulatory system.
Index.
1. New words2. The circulatory system .3. Parts of the circulatory system.4. Healthy habits.5. Experiment6. Activities.
![Page 3: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/3.jpg)
1. New words.
Unit 3(b): Human body.
•Blood vessels- Vasos sanguíneos•Arteries- arterias•Veins- venas•Chambers- compartimentos•Capillaries- capilares•the pulses- pulsaciones•Blood pressure- tensión arterial•Heart beat rate- tasa de pulsaciones•Restrug- descansando•Disorder- alteraciones, enfermedades•Hollow- hueco•Fist- puño•Atrium- aurícula•Ventricle- ventrículo•Thick - grueso
![Page 4: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/4.jpg)
2-º The Circuylatory system.
Unit 3(b): Human body.
The circulatory system.
CIRCULATION consists of transporting nutrients, oxygen and residues around the body
![Page 5: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/5.jpg)
3. The Circulatory system.
Unit 3(b): Human body.
The circulatory System consists of:
•Blood vessels•Blood•Heart
![Page 6: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/6.jpg)
1. The Circuylatory system.Unit 3(b): Human body.
![Page 7: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/7.jpg)
BLOOD VESSELS
• Blood vessels are the conducts through which the blood circulates, pushed by the heart.
![Page 8: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/8.jpg)
THERE ARE THREE TYPES
• VEINS: they transport the blood from the organs to the heart.• ARTERIES: they transport the blood from
the heart to the organs.• CAPILLARIES: They are very small vessels
that connect the veins and arteries and reach all the cells in our body.
![Page 9: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/9.jpg)
THERE ARE THREE TYPES
• VEINS are thinner than arteries
• ARTERIES are the thickest
• CAPILLARIES are the thinnest
![Page 10: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/10.jpg)
![Page 11: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/11.jpg)
• Veins are blue because they are carrying the darker blood without oxygen back to heart.
![Page 12: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/12.jpg)
• Arteries have oxygenated blood that is bright red colour.
![Page 13: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/13.jpg)
The oxygen and CO2 are exchanged…in the cells
Oxygen Rich
Oxygen Rich
Oxygen Poor
Oxygen Poor
Tissue
Gas Exchange Occurs,
Now lets go back to the heart!!!
![Page 14: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/14.jpg)
The Human Heart
The first person to describe circulation as we know it today was Dr. William Harvey
![Page 15: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/15.jpg)
THE HEART
The heart is a hollow organ made of muscle.
![Page 16: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/16.jpg)
The heart is placed in the chest, a little to the left side.
In the adult it weighs 300 grs and it is about the size of a fist.
![Page 17: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/17.jpg)
It is divided into two unconnected parts the right and left.
Each part is also divided into two:• The upper part is THE ATRIUM• The lower part is THE VENTRICLE• The atrium and the ventricle are connected by a valve.
![Page 18: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/18.jpg)
![Page 19: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/19.jpg)
![Page 20: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/20.jpg)
The blood.
In an adult´s body there are about five litres of blood.
![Page 21: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/21.jpg)
BLOOD COMPOSITION
Blood is a thick, red liquid composed of:
plasma Blood cells
![Page 22: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/22.jpg)
Whole Blood Sample
Red blood cells
White blood cells
Platelets
Plasma
Sample Placed in Centrifuge Blood Sample That Has Been Centrifuged
![Page 23: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/23.jpg)
PLASMAPlasma is water with different substances
dissolved in it. It transports the
nutrients and the residues.
![Page 24: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/24.jpg)
BLOOD CELLSThere are three types:
RED BLOOD CELLS: give blood its colour and transport
oxygen and carbon dioxide.
![Page 25: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/25.jpg)
WHITE BLOOD CELLS: protect us and defend us from
infections.
![Page 26: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/26.jpg)
PLATELETS: block our wounds so we do not lose too much blood.
Break in Capillary Wall
Clumping of Platelets
Clot Forms
![Page 27: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/27.jpg)
THE FUNCTIONS OF THE BLOOD
*Blood transports nutrients and oxygen to the cells and take away the
residues to where they are eliminated.
*It also defends our body from infections.
![Page 28: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/28.jpg)
Your Heart: The Vital Pump
• At REST, the heart pumps at 70 beats a minute. It is usually faster in children.
• During exercise it may increase to double the resting rate.
• Also emotions and illnesses may cause the heart to beat faster.
![Page 29: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/29.jpg)
What are the pulses?
In certain places, at the wrists, in the neck on the temples, arteries are near the surface
and cen be felt easily.Doctors take the pulses to know the
regularity of the heart.
![Page 30: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/30.jpg)
What is blood pressure?
It is the pressure of blood in the arteries which can be too high or to
low in some diseases.A normal blood pressure is 120/80
![Page 31: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/31.jpg)
Blood Types
Massive loss of blood requires a transfusionFour Types
AB
ABO
Inherited from your parents
![Page 32: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/32.jpg)
Blood Types
![Page 33: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/33.jpg)
What Makes Our Blood Type?
![Page 34: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/34.jpg)
Blood Type of Donor
A
B
AB
O
Blood Type of Recipient
A B AB O
Unsuccessful transfusion Successful transfusion
Blood Transfusions
![Page 35: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/35.jpg)
![Page 36: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/36.jpg)
LUNGS
![Page 37: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/37.jpg)
The CirculatorySystem.Healthy habits
![Page 38: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/38.jpg)
Current PREVENTION Recommendations
Regular exercise
![Page 39: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/39.jpg)
Weight control
![Page 40: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/40.jpg)
Well balanced diet
![Page 41: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/41.jpg)
Do not eat too much junk food
It contains cholesterol, a fat that collects in our blood vessels and blocks them.
![Page 42: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/42.jpg)
Do not smoke
![Page 43: Unit 3c](https://reader035.vdocument.in/reader035/viewer/2022081515/55851aead8b42aff298b531c/html5/thumbnails/43.jpg)
SummaryHealthy Habits
• Regular exercise• Weight control• Well balanced diet• Do not eat too much junk food• Do not smoke