We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What is a Syringe Barrel?

By Maggie Worth
Updated Feb 22, 2024
Our promise to you
WiseGeek is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At WiseGeek, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

A syringe barrel is the cylindrical part of a syringe that holds fluid to be injected, or fluid that has been withdrawn. The barrel is usually made of glass or plastic. It is often marked with measurements that allow physicians, nurses, or technicians to be sure they are administering the correct dose or drawing enough fluid.

Each syringe has several parts. A plunger draws fluids into and pushes fluids out of the barrel. The hub is connected to the barrel and forms a funnel through which the fluid passes into the needle. A protective cap covers the needle so that it remains sterile, and so that no one is injured by the sharp point.

Needleless syringes propel the fluid out of the syringe barrel, through the hub, and into an open cavity. The most common example is an oral syringe, which may be used to administer medications to children and animals. Other examples are the nasal syringe and the enema syringe. Needleless syringes may also be used to propel medications into an animal's ear.

Syringes that have needles are used to give injections, sometimes known as shots. In these cases, the syringe barrel may hold a vaccine, a liquid vitamin, an antibiotic, a pain reliever, a fertility drug, or another medication. The markings on the barrel are critical to injections because even a small error in dosage of some drugs can have serious consequences.

Needled syringes are also used to draw fluids from the body. The most common example is the drawing of blood, in which a medical professional inserts the needle into a patient's vein and draws it into the syringe barrel. A laboratory will then analyze the blood to look for deficiencies, anomalies, or excesses that may indicate a disease or condition. Medical professionals may also draw spinal fluid, amniotic fluid, or even samples of brain tissue for analysis.

In withdrawals, the markings on the barrel show how much fluid or tissue has been drawn. This is important because the laboratory must have a minimum sample in order to run the proper tests. Drawing another sample wastes time that may be critical to diagnosing and treating the patient. Some fluid and tissue draws are also painful for the patient, so making sure to take an adequate sample helps prevent additional discomfort.

Those outside the medical profession may also use syringes. Scientists use them to take samples, mechanics use them to inject rubber filler into tires, and chefs use them to fill pastries and candies. As a result, a syringe barrel can be used to hold anything from pond water to sealant to raspberry jelly.

WiseGeek is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Discussion Comments
WiseGeek, in your inbox

Our latest articles, guides, and more, delivered daily.

WiseGeek, in your inbox

Our latest articles, guides, and more, delivered daily.