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www.reference.com/article/systemic-disease-f45a922fa073e349

Systemic disease is disease that affects the whole body, instead of being restricted to a body part or organ, according to MedlinePlus. Examples of systemic diseases include influenza and systemic lupus erythematosus, a disease in which the body's immune system attacks ...

www.reference.com/article/digestive-system-diseases-3db53a2ccb3c4c1f

Digestive system diseases include gastroesophageal reflux disease, or GERD, celiac disease, Crohn’s disease and diverticulitis, states Everyday Health. It is common to have a digestive system problem, and patients with symptoms of these conditions should talk to their d...

www.reference.com/article/diseases-respiratory-system-d32c54e8dea8f19e

Some common respiratory diseases include asthma, cystic fibrosis, chronic bronchitis and emphysema. Smoking, infections and genetics are responsible for most diseases of the respiratory system, according to WebMD.

www.reference.com/article/nervous-system-diseases-d590eaa4be1d896a

Nervous system diseases include degenerative diseases, such as multiple sclerosis, Parkinson’s disease and Alzheimer’s disease; brain tumors; and infections, such as encephalitis or meningitis, according to WebMD. Nervous system functioning may also be impaired due to s...

www.reference.com/article/diseases-affect-muscular-system-20da74a4f24214a

Diseases that affect the human body's muscular system include genetic disorders such as muscle dystrophy and cancers such as soft tissue sarcoma, according to MedlinePlus. Glycogen-storage diseases, tetany and myotonia congenita can also affect the muscular system, note...

www.reference.com/article/diseases-cause-body-odor-d780fbeef9fbff6b

Some diseases that cause body odor are trimethylaminuria and bromhidrosis, according to Medscape and MedicineNet. Trimethylaminuria is an error of metabolism associated with the smell of rotting fish. Bromhidrosis is body odor that results from apocrine gland secretion....

www.reference.com/article/diseases-circulatory-system-cf7dbdb56bbb9c97

There are many diseases of the circulatory, or vascular, system, such as peripheral artery disease, Buerger's disease and peripheral venous disease, notes WebMD. Vascular diseases can affect the arteries, veins and lymph vessels and include blood disorders that impair c...