What are several organs working together to perform a variety functions called. Body System.

Organ System (Level of Organization) An organ system is two or more organs working together to perform a specialized function (job).

The cells in nervous tissue that generate and conduct impulses are called neurons or nerve cells. These cells have three principal parts: the dendrites, the cell body, and one axon. The main part of the cell, the part that carries on the general functions, is the cell body.

Which term best describes small, pinpoint hemorrhages of the skin? Petechia.

Petechiae: Pinpoint flat round red spots under the skin surface caused by intradermal hemorrhage (bleeding into the skin).

Ecchymosis occurs when blood leaks from a broken capillary into surrounding tissue under the skin. This causes discoloration.

Symptoms of purpura

• Low platelet count, which may lead to increased bleeding after an injury, bleeding gums or nose, or blood in urine or bowel movements.
• Sore, swollen joints, particularly in the ankles and knees.
• Gut problems such as nausea, vomiting, diarrhea, or stomach pain.

The four main characteristics of Henoch-Schonlein purpura include: Rash (purpura). Reddish-purple spots that look like bruises develop on the buttocks, legs and feet. The rash can also appear on the arms, face and trunk and may be worse in areas of pressure, such as the sock line and waistline.

Ecchymosis turns the skin a dark purple color. As the bruise heals, it may turn green, yellow, or brown. The bruise symptoms you’re probably familiar with include: Pain over the bruise.

Most minor or moderate ecchymosis are treated with non-steroidal anti-inflammatory medications (NSAIDs), such as ibuprofen, to reduce pain and swelling. Doctors typically recommend elevating the bruised area and applying ice to lessen symptoms such as pain and swelling.

Ecchymosis is the medical term for the common bruise. Most bruises form when blood vessels near the surface of the skin are damaged, usually by impact from an injury. The force of the impact causes your blood vessels to burst open and leak blood.

Bleeding into the skin can occur from broken blood vessels that form tiny red dots (called petechiae). Blood also can collect under the tissue in larger flat areas (called purpura), or in a very large bruised area (called an ecchymosis).

A hematoma is defined as a solid swelling of clotted blood within the body’s tissues. Ecchymosis is a skin discoloration that results from bleeding underneath the skin and usually larger than 1 cm or .

Hematomas usually clear on their own, slowly getting smaller over time as the accumulated blood is absorbed. It might take months for a large hematoma to be fully absorbed.

Ecchymosis: Are They the Same Thing?: A hematoma is a collection of blood outside of a blood vessel and ecchymosis is flat, purple-colored bruise. Symptoms and signs of hematomas and ecchymosis that are different include skin discoloration and where it is located.

What are the causes of hematoma? The most common cause of a hematoma is injury or trauma to blood vessels. This can happen as a result of any damage to blood vessels that can disrupt the integrity of the blood vessel wall. Even minimal damage to a small blood vessel can result in a hematoma.

While corrective glasses or contacts are needed to improve eyesight, using your eyes with or without glasses will not damage your vision further. Myth: Reading in dim light can damage your eyes. Fact: Reading in dim light can cause eye strain, but it will not hurt your eyes permanently.

Yes, wearing glasses does improve eyesight–but only while you’re wearing them. They’ll work with it to provide you with the best visual acuity, at least while you’re wearing corrective eyewear. In other words, your lenses will correct your vision based on your prescription.

There are two treatments for the common levels of astigmatism:

1. Corrective lenses. That means glasses or contacts. If you have astigmatism, your doctor will probably prescribe a special type of soft contact lenses called toric lenses.
2. Refractive surgery. Laser surgery also changes the shape of your cornea.

You can be nearsighted or farsighted and have astigmatism, too. They’re all considered refractive error conditions. The most common symptom of astigmatism is blurry or distorted vision, both close up and at a distance. You may also have a harder time seeing clearly at night.

Astigmatism is not an eye disease or health problem. While it can cause blurred vision, eye strain, and headaches, particularly after prolonged reading, it does not cause blindness.

Astigmatism often occurs with nearsightedness and farsightedness, conditions also resulting from refractive errors. Astigmatism is not a disease nor does it mean that you have “bad eyes.” It simply means that you have a variation or disturbance in the shape of your cornea.

Moderate Astigmatism 1.00 to 2.00 diopters. High Astigmatism 2.00 to 4.00 diopters. Extreme Astigmatism > 4.00 diopters.

Whether you need glasses really comes down to how clearly you can see and how strong your astigmatism is. You’ll need glasses for your astigmatism if your vision is blurry or you have eyestrain. You’ll also need glasses to address your astigmatism if you have: Double vision.