CK12 Life Science

Blood Vessels and Blood Pressure Blood pressureis the force exerted by circulating blood on the walls of blood vessels. The cont ...

Systolic: less than 120 mm Hg Diastolic: less than 80 mm Hg Blood pressure is usually written as systolic/diastolic mm Hg. For ...

Figure 18.22: Atherosclerosis is sometimes referred to ashardeningof the arteries; plaque build-up reduces the blood flow throug ...

Figure 18.23: A blockage in a coronary artery stops oxygen getting to part of the heart muscle; areas of the heart that depend o ...

GeneticsFamily history of cardiovascular disease increases a person’s chance of devel- oping heart disease. Risk factors you ca ...

Although there are uncontrollable risk factors, a person whose family has a history of CVD does not have to develop heart diseas ...

Figure 18.25: The USDA’s MyPyramid recommends that you limit the amount of such foods in your diet to occasional treats; some fo ...

Review Questions What is the cause of blood pressure? How is the pulse related to blood pressure? Is the blood in veins under p ...

risk factor Anything that is linked to an increased chance of developing a disease or an infection. stroke A loss of brain funct ...

(12) http://commons.wikimedia.org/wiki/File:Basket_sky.JPG. Public Domain. (13) NIH.http://commons.wikimedia.org/wiki/File:Redbl ...

Chapter 19 Respiratory and Excretory Systems 19.1 Lesson 19.1: Respiratory System Lesson Objectives Identify the parts of the r ...

Roles of the Respiratory System Your respiratory system is made up of the tissues and organs that allow oxygen to enter and carb ...

Parts of the Respiratory System Figure 1 shows many of the structures of the respiratory system. Each of the parts has a specifi ...

Figure 19.2: The alveoli are the tiny grape-like structures in the lungs and the sites of gas exchange. ( 11 ) Figure 19.3: Bein ...

and cause the ribs to move outward. This causes the chest volume to increase. Because the chest volume is larger, the air pressu ...

Sometimes breathing is calledrespiration. But, there is much more to respiration than just breathing. There are actually two par ...

Breathing and Cellular Respiration The oxygen that arrives at the cells from the lungs is used by the cells to release the energ ...

What is the name of the waste gas that is released during exhalation? If a disease caused the alveoli to collapse, how might th ...

Points to Consider How do you think the health of your respiratory system might affect the health of other body systems? 19.2 ...

diseases are common and may cause illness or death. Some respiratory diseases are caused by bacteria while others are caused by ...