CK12 Life Science

Bronchitis Bronchitisis an inflammation of the bronchi.Acute bronchitisis usually caused by viruses or bacteria and may last sev ...

Figure 19.7: The two reactions that lead to asthma are when the bronchioles swell and the muscles around the bronchioles contrac ...

Figure 19.8: A public health notice from the early 20th century reminded people that TB could be spread very easily. ( 9 ) ...

Emphysema Emphysemais a chronic lung disease caused by loss of elasticity of the lung tissue. The surfaces of healthy alveoli ar ...

Figure19.10: Thisis theinfluenzavirus thatcauses theflu; theCDC (TheCenterfor Disease Control and Prevention) recommends that ch ...

Cardiovascular diseases caused by smoking include heart disease and stroke. Diseases of the respiratory system that are caused b ...

Keeping Your Respiratory System Healthy Many of the diseases related to smoking are calledlifestyle diseases, diseases that are ...

Figure 19.12:Cover your Cough; Clean your Handsis a public health campaign that reminds people of the quickest and easiest ways ...

Lesson Summary Respiratory diseases are diseases that affect the lungs, bronchial tubes, trachea, nose, and throat. Respiratory ...

action do you think these drugs have on the lungs? What lifestyle activity has the largest health impact on the respiratory sys ...

pathogen An organism that causes disease in another organism; certain bacteria, viruses, and fungi are pathogens of the respirat ...

illness and death of cells, tissues, and organs. The organs of your excretory system help to keep the correct balance of water a ...

your body has taken what it needs from the food, waste products are left behind in the blood and in the large intestine. These w ...

muscular, and elastic-walled organ. It is shaped a little like a balloon. It is the organ that collects urine which comes from t ...

Figure 19.14: Structures of the kidney; fluid leaks from the capillaries and into the nephrons where the fluid forms urine then ...

Figure 19.15: The location of nephrons in the kidney; the glomerulus is the network of blood vessels that filter liquid into the ...

Formation of Urine The process of urine formation is as follows: Blood flows into the kidney through the renal artery, shown in ...

The filtering action of the kidneys is controlled by the pituitary gland. The pituitary gland is about the size of a pea and is ...

urinary system. They vary in size. Some stones cause great pain while others cause very little pain. Some stones may need to be ...

hemodialyzer) filters the blood of waste by pumping it through a semipermeable membrane. The cleansed blood is then returned to ...