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This narrated 2D animation shows how the heart muscles contract and the chambers of the heart push blood through the circulatory system.

This animation shows an artist's rendition of the immune system function in the gastrointestinal during Crohn's disease. It also shows a possible future treatment for the disease.

This animation shows the immune system reacting (or overreacting) at the cellular level. It describes what happens when an allergen, like dander or pollen, enters the body. It also shows how some allergy medicines work, like anti-histamines.

This narrated animation describes the effect of one type of hepatitis, hepatitis C. It describes the most common symptoms of hepatitis C and the various long term consequences of the disease.

This animated video shows techniques for breast self-examination and describes some of the abnormalities the may occur during the exam. While this video provides an overview of breast self-examination, ask your doctor to show the proper technique before you adopt the practice at home.

Stents are metal cylinders that can be increased in size to treat various diseases of arteries like atherosclerosis and aneurysm. This animation shows a pericardium covered stent and its uses. The pericardium is actually heart tissue taken from the covering of the heart. This therapy may not yet be widely available or approved in all patients.

A large portion of the stomach is removed during a sleeve gastrectomy. This video provides a 3D animation of how the procedure is performed and what the gastrointestinal system looks like afterwards.

The influenza virus, the pathogen that causes the flu, infect the cells of the respiratory system as shown in this animation. The immune system response to influenza virus infection is also shown.

The spleen is one of the most misunderstood organs in the body. This narrated animation describes both the anatomy and function (physiology) of the spleen.

The sugar (glucose and others) that we eat must have insulin in order for it to enter our tissues. This video shows what happens in diabetes mellitus when tissues are insensitive to insulin. This is the case in Type 2 diabetes.

The animation explains how the lungs provide oxygen to and remove carbon dioxide from the blood. The specialized anatomy of the air sac in the lung allows the gas exchange to occur efficiently, as discussed and shown in the video.

A plastic surgeon describes the anatomy of the nose and how these structures can interfere with breathing, cause sinus problems, or be less than ideal cosmetically. This video, which uses graphical animations as teaching tools, explains how the bones and cartilage of the nose contribute to common nasal defects.

The sinuses in the skull can become blocked and inflamed leading to pain and sometimes fever. The traditional surgical treatment for blocked sinuses was to use rigid instruments to enlarge the areas that drain the sinuses. A newer approach, which is shown in this animation, involves the insertion and inflation of a balloon to expand the sinus outlets. This approach is similar to balloon angioplasty used in damaged or blocked blood vessels.

The video is an animation of the LapBand adjustable gastric banding system. There is an explanation of how the LapBand's adjustable cuff works to meet the changing needs of the patient.

While most people have Type 2 Diabetes Mellitus, Type 1 Diabetes (sometimes called juvenile diabetes) is still fairly common. This narrated video describes the biology and pathology of Type 1 Diabetes, how it is treated, and what can occur if blood sugar levels become abnormal. In contrast to Type 2 Diabetes, the pancreas does not excrete insulin in Type 1 Diabetes Mellitus.

This video shows the constant battle between the two main cell types in bone, osteoblasts and osteoclasts. Osteoblasts builds bone while osteoclasts dissolve bone for renovation and remodeling. The video explains how these cells influence the strength of bone throughout life.

Mastectomy or breast removal surgery is the most common treatment for certain types of breast cancer. The various types of mastectomy procedures are described including a modified radical mastectomy and lumpectomy in this narrated animation.

A Transurethral Resection of the Prostate or TURP is a procedure to expand the dimensions of the urethra or urine outflow tract. This video shows what a urologist sees during a TURP. Note that this video shows surgery on an living human.

A modified radical mastectomy is a major surgery used to treat breast cancer. This animation shows which anatomical structures are removed during a modified radical mastectomy and how the procedure is different from other forms of mastectomy (breast removal surgery).

The lymphatic system keeps our tissues from retaining fluid and houses many of the key components of the immune system, like lymph nodes. Learn how this underappreciated body system is organized and how it functions.

This video shows a close up view of bone anatomy and how blood is delivered to bone.

The animated video, narrated by a physician, describes the two main types of stroke: ischemic and hemorrhagic stroke. Ischemic strokes are further subdivided into thrombotic strokes and embolic strokes while hemorrhagic strokes are classified into subarachnoid hemorrhage and intracerebral hemorrhage. The location of the stroke in the brain directly influences the kind and degree of neurological deficit, which is discussed.

This narrated animation explains how normal cells sometimes change and turn into cancer cells. It touches on some of the causes and the prevalence of cancer and cancer deaths in the population.

The shoulder is a complex joint that permits the arm to move in almost every direction. This narrated animation shows the steps involved in a shoulder replacement surgery.

The spleen is the largest organ in your immune system and, while useful and important, is not necessary for survival. In certain diseases it is often better for overall health if the spleen is removed in a procedure known as a splenectomy. This narrated video shows where the spleen is located in the body and several of the non-emergent reasons for which the spleen may need to be removed.

This animation provides a very brief overview of body anatomy, from the entire body down to subcellular organelles.

This stylized animation shows what a cell might look like at very high magnification. It begins by showing the cell membrane and the proteins that hold the cell together. The video continues to describe the internal workings of a cell. While the narration is very detailed and accurate, this video may use terminology that is advanced for a general audience.