What is the meniscus in a graduated cylinder?
meniscus definition. A concave surface of a liquid resulting from surface tension. The bottom of the meniscus is used to measure the volume of a liquid in apparatus such as a graduated cylinder.
Why is a meniscus important when reading a graduated cylinder?
For a concave meniscus, the correct volume will be read at the bottom of the curve. For a convex meniscus, the opposite is true and the correct reading will be at the top of the curve. Reading a meniscus properly is important for lab safety, since mixing incorrect amounts of materials can be dangerous.
How do you read the meniscus in a graduated piece of glassware?
Measure so that the line you are reading is even with the center of the meniscus. For water and most liquids, this is the bottom of the meniscus. For mercury, take the measurement from the top of the meniscus. In either case, you are measuring based on the center of the meniscus.
What is a meniscus?
The meniscus is a c-shaped pad of cartilage in the knee that acts as a shock absorber. Each knee has two menisci. Meniscus tears are common knee injuries. Knee arthroscopy is often used to treat meniscal tears.
What is the meniscus of water?
A meniscus is a curve in the surface of a molecular substance (water, of course) when it touches another material. With water, you can think of it as when water sticks to the inside of a glass.
What is the meniscus and how should it be used when measuring the volume of water in a graduated cylinder?
A meniscus is the curvature of the surface of the water. Water “sticks” to the walls of the graduated cylinder, but only on the sides and not the middle. When students look at the surface, the water level is not straight. Measurement should be at the lowest point (see figure to the right).
What is a graduated cylinder do?
Graduated cylinders are long, slender vessels used for measuring the volumes of liquids. They are not intended for mixing, stirring, heating, or weighing. Graduated cylinders commonly range in size from 5 mL to 500 mL. Some can even hold volumes of more than a liter.
Can a meniscus tear heal without surgery?
Meniscus tears are the most frequently treated knee injuries. Recovery will take about 6 to 8 weeks if your meniscus tear is treated conservatively, without surgery.
What causes a meniscus?
A torn meniscus can result from any activity that causes you to forcefully twist or rotate your knee, such as aggressive pivoting or sudden stops and turns. Even kneeling, deep squatting or lifting something heavy can sometimes lead to a torn meniscus.
What is the knee meniscus?
The knee meniscus is a special layer of extra cartilage that lines the knee joint. The job of the meniscus is to cushion the knee joint and transfer forces between the tibia and femur, the thigh and shin bones. Most of the joints in our body are lined with a thin layer of articular cartilage, made of collagen and chondroitin.
Why tissue engineering the knee meniscus?
Apart from its potential clinical benefit, a tissue-engineered meniscus can also be of great use in the study of developmental, regenerative, and degenerative processes in the knee. Despite considerable diversity amongst current strategies for tissue engineering the meniscus, several important design principles are emerging.
What is knee arthroscopy for meniscus tears?
Knee arthroscopy is often used to treat meniscal tears. What is a meniscus tear? The menisci sit between the tibia (lower leg bone) and the femur (thigh bone) and protect the lower part of the leg from the shock created by our body weight.
How force is transduced upon and throughout the knee meniscus?
How force is transduced upon and throughout the knee meniscus Free body diagram of the forces acting on the knee meniscus during loading (for simplicity, only the lateral meniscus is shown). During everyday activity, the menisci are compressed by the downward force of the femur.