In dark or dim light, the pupil dilates to allow more light into the eye to improve vision. Normal pupil size tends to range between 2.0 and 5.0 millimeters, depending on the lighting. The younger you are, the larger your pupils tend to be.

As more couples explore anal sex, understanding the risks, rewards, and proper strategy is important. Here's what you need to know about safety and more.

In this video a case in which an infected implant was removed.He how the infected are progressed and shows how the implant was removed. He then discusses how the area will heal and when further surgery can be performed.

The goal of breast cancer surgery is to remove the entire tumor from the breast. Some of the lymph nodes in the underarm area (axillary nodes) may also be removed to see if cancer cells are present.

This is a breast life surgery. Over the years, factors such as pregnancy, nursing and the force of gravity take their toll on a woman's breasts. As the skin loses its elasticity, the breasts often lose their shape and firmness and begin to sag. Breast lift is a surgical procedure to raise and reshape the breasts (at least for a time). If your breasts are small or have lost volume (for example from pregnancy) breast implants inserted in conjunction with mastopexy can increase both their firmness and their size.

External jugular vein cannulation is an integral part of modern medicine and is practiced in virtually every health care setting. Venous access allows sampling of blood, as well as administration of fluids, medications, parenteral nutrition, chemotherapy, and blood products. [1] This topic describes placement of an intravenous (IV) catheter into the external jugular vein. A similar technique can be used for placement of IV catheters at different anatomic sites.

Intramuscular (IM) injection Tutorial for Nurses Video

Twin Childbirth Video

Funny musical anoscope. I bet you will want to add it to your tools

Restoring Chipped Teeth

Porcelain Veneers

A LASAG Yag laser is in thermal mode, 1.5 Joules/pulse to treat the trabecular meshwork between the cornea and iris for glaucoma. The view is of the inside anterior eyeball.

Appendectomy operation

A video showing the technique of BoTox injection which is widely used by plastic surgeons to make wrinkles disappear

A very interesting video showing how white blood cells (Neutrophil) are chasing bacteria (Diplococci). It also shows how the white blood cell engulf the bacteria. This is a real video.

Immunohistochemistry or IHC refers to the process of detecting antigens (e.g., proteins) in cells of a tissue section by exploiting the principle of antibodies binding specifically to antigens in biological tissues.[1] IHC takes its name from the roots "immuno," in reference to antibodies used in the procedure, and "histo," meaning tissue (compare to immunocytochemistry). Immunohistochemical staining is widely used in the diagnosis of abnormal cells such as those found in cancerous tumors. Specific molecular markers are characteristic of particular cellular events such as proliferation or cell death (apoptosis). IHC is also widely used in basic research to understand the distribution and localization of biomarkers and differentially expressed proteins in different parts of a biological tissue. Visualising an antibody-antigen interaction can be accomplished in a number of ways. In the most common instance, an antibody is conjugated to an enzyme, such as peroxidase, that can catalyse a colour-producing reaction. Alternatively, the antibody can also be tagged to a fluorophore, such as fluorescein or rhodamine

Over one million Americans have the sexually transmitted virus, HIV, which can lead to the deadly disease known as AIDS.
HIV can be transmitted in the sexual fluids, blood or breast milk of an infected person. HIV prevention therefore involves a wide range of activities including prevention of mother-to-child transmission, needle exchanges and harm reduction for injecting drug users, and precautions for health care workers.

A funny animation showing A Stupid Surgeon and MedicalVideos.US

Systemic Lupus Erythematosus Animation 3d

Key facts

Hepatitis B is a viral infection that attacks the liver and can cause both acute and chronic disease.
The virus is transmitted through contact with the blood or other body fluids of an infected person - not through casual contact.
About 2 billion people worldwide have been infected with the virus and about 350 million live with chronic infection. An estimated 600 000 persons die each year due to the acute or chronic consequences of hepatitis B.
About 25% of adults who become chronically infected during childhood later die from liver cancer or cirrhosis (scarring of the liver) caused by the chronic infection.
The hepatitis B virus is 50 to 100 times more infectious than HIV.
Hepatitis B virus is an important occupational hazard for health workers.
Hepatitis B is preventable with a safe and effective vaccine.

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Hepatitis B is a potentially life-threatening liver infection caused by the hepatitis B virus. It is a major global health problem and the most serious type of viral hepatitis. It can cause chronic liver disease and puts people at high risk of death from cirrhosis of the liver and liver cancer.

Worldwide, an estimated two billion people have been infected with the hepatitis B virus (HBV), and more than 350 million have chronic (long-term) liver infections.

A vaccine against hepatitis B has been available since 1982. Hepatitis B vaccine is 95% effective in preventing HBV infection and its chronic consequences, and is the first vaccine against a major human cancer.