1. Science, Tobacco & You
DSBPC

2. Objectives
Identify the major structures and functions of the respiratory and cardiovascular system?
Calculate respiration, heart rate, and lung capacity.
Identify the effects of tobacco on the respiratory and circulatory systems

3. Focus Question
How does cigarette smoking affect the respiratory and cardiovascular systems of the body?

4. Respiration and the Respiratory System
The respiratory system is the group of organs that take in oxygen and get rid of carbon dioxide (Respiration).
Two parts of respiration are breathing and cellular respiration.
Breathing the act of inhaling and exhaling
Cellular respiration is the process which releases energy from food using chemical reactions.

5. Pathway of Oxygen Nose Pharynx  Larynx  Trachea  Bronchi
Bronchioles
Alveoli

6. Important Parts
Your nose is the main passageway into and out of the respiratory system. It is lined with hairs and mucus to filter the air.
The epiglottis is a flap of skin that prevents food from going into the trachea.
The larynx is the part of the throat that contains the vocal cords. Air is forced through the larynx and the cords vibrate producing sounds.

7. More important parts
The trachea, or windpipe, is the large tube connecting the larynx to the lungs.
The trachea splits into two branches called bronchi. One bronchus connects to each lung. In the lungs, each bronchus branches into bronchioles, which branch to form thousands of tiny sacs called alveoli.

10. Breathing
Breathing is done by the diaphragm and rib muscles. The diaphragm is a dome-shaped muscle beneath the lungs

11. Cardiovascular System
Our Transport system

12. Cardiovascular Function of the Cardiovascular System
Transport system
Oxygen from the lung
Carbon Dioxide to the lung
Nutrients from the digestive system
Waste to the kidneys
The cardiovascular system consists of the heart, blood, and the three types of blood vessels.

14. The Heart Your heart is an organ made mostly of cardiac muscle tissue.
4 chambers
2 upper chambers called atria
2 lower chambers called ventricles.

18. Blood Vessels
Arteries are blood vessels that carry blood away from the heart and to the body’s organs.
Capillaries are tiny blood vessels that allow the exchange between body cells and blood.
Veins are blood vessels that carry blood back to the heart.

22. Two Types of Circulation
Pulmonary circulation is the flow of blood from the heart to the lungs and back to the heart through the pulmonary arteries, capillaries, and veins.
Systemic circulation is the flow of blood from the heart to all parts of the body and back to the heart.