The black widow is a poisonous spider found in most of the United States. This black or dark brown spider may grow to 1 1/2 inches in length; some species have a characteristic red hourglass underneath the abdomen. They generally live outdoors but...
Black widow spiders are one of the few types of poisonous spiders in the United States. They usually reside in warm climates, including deserts and the Southeast. They are typically black in color with a red marking on their abdomen that resembles...
The black widow spider has found her way into American culture as a symbol of danger. However, this shy, unassuming shiny black spider with the red hourglass on her belly only bites when disturbed. Her bite can be lethal, though, and warrants...
The female black widow spider is considered the most venomous spider in North America. The black widow can be identified by the distinctive hourglass shaped red marking on the abdomen. The venom of the black widow is a neurotoxin, meaning it...
Black widows are typically considered the most venomous spiders in North America, according to "National Geographic." You can find them almost anywhere in the United States and North America, as well as some parts of Europe, Asia and Africa. If...
All spiders have hollow fangs to inject venom into their victims---usually other insects---but in most species, the fangs are too short or too fragile to break human skin. The brown recluse spider and the black widow spider are among the very few...
A black widow is a poisonous spider found in most regions of the United States. It is recognized by its shiny black body and signature red hourglass figure on the abdomen. Although it is rare for death to occur from a black widow bite, there are...
The brown recluse spider and the black widow spider are dangerous to humans because their fangs can penetrate skin and inject poisonous venom. Brown recluse spiders have an upside-down violin-shaped marking down their backs and live only in the...
Itching, or pruritus, is the skin's response to some type of internal or external irritant. The skin sends signals to the brain that alert the body's senses to the need to scratch. Skin scraping or a biopsy may be needed to determine the cause of...
Although most spiders don't pose a danger to humans, some-such as the black widow spider--may cause serious problems for those bitten by them. MayoClinic.com indicates that these spiders prefer warm, dry climates and are often found “in dry,...
Although humans worldwide encounter many species of spider, only a few spiders present a threat. Two poisonous spiders are present in North America. The black widow spider and the brown recluse spider are both dangerous to humans and are found in...
Of the tens of thousands of spider species around, most pose no serious danger to your children, as their venom is too weak or their jaws are not strong enough to pierce the skin. The black widow, which National Geographic identifies as the most...
Curare is a substance extracted from certain South American plants like Strychnos toxifera. It was first used to coat darts and arrows to paralyze and kill animals and people by natives to the Amazon and Orinoco regions. It has been reproduced...
The black widow is one of the few dangerous spiders in the United States. Even though black widow spider bites can cause health problems, they are rarely lethal. Individual reactions to bites vary greatly but effective treatment rarely requires...
Calcium chloride is both a medicinal aid and an industrial chemical, making it one of the more versatile compounds available. A rock salt by nature, the Household Products Database of the National Institutes of Health indicates that calcium...
Calcium gluconate is a salt of calcium. The gluconic acid moiety is a modified sugar. Calcium gluconate is primarily administered intravenously to treat hypocalcemia. Although it is also sold as oral supplements, calcium gluconate contains much...
Calcium deficiencies can result from diet, age, stress, lactose intolerance, medications or disease. High-salt diets, excessive caffeine and alcohol and/or low body weight can cause low calcium absorption. Although excellent food sources include...
Erection problems are common in adult men, says MedlinePlus. In fact, these erection difficulties are typically temporary and may be due to alcohol, nicotine, stress, anger, fear, or medications such as digoxin or sleeping pills. Typically, men...
Antibodies never have to worry about unemployment, because they have a lifelong job in the fight against infections. Antibodies are also called immunoglobulins because they are part of your immune system and they are a type of protein that is...
Calcium chloride is a salt. One molecule of calcium chloride contains one calcium atom and two chloride atoms. At room temperature, it is solid and it dissolves easily in water. It can be used to dry things because it rapidly absorbs water and it...
When your child breaks out in any kind of bumps, you probably tell her not to touch them, even if they itch. Bumps on the foot pads present a problem because you generally can't tell your child to stop walking altogether. Instead, treatment...
Spider bites can cause pain and scary-looking sores, but in many cases, are not dangerous to the health. Bites from black widow and brown recluse spiders may cause serious harm in some people and may require professional medical care and...
Manufacturers of black herbal ointments offer the products as a remedy for a variety of ailments, including pain from spider bites and hot flashes caused by menopause. Black cohosh, also called black snakeroot, is one source of ointment, while...
