Glossary >
Body fluids

Understanding Body Fluids - Types, Functions, and Importance

Understanding Body Fluids - Types, Functions, and Importance

Body fluids are the liquids found within and around the human body. These fluids play a crucial role in maintaining the health and function of the body, including regulating body temperature, transporting nutrients and oxygen, and removing waste products.

There are several types of body fluids, including blood, lymph, cerebrospinal fluid, urine, sweat, and digestive juices. Each of these fluids has a unique composition and function within the body.

  • Blood is a vital body fluid that is responsible for transporting oxygen and nutrients to the body's tissues and organs.
  • Lymph is a clear fluid that helps to remove waste products and excess fluids from the body's tissues.
  • Cerebrospinal fluid is a clear, colorless liquid that surrounds the brain and spinal cord, providing cushioning and protection.
  • Urine is a waste product that is produced by the kidneys and excreted from the body through the urinary system.
  • Sweat is produced by sweat glands and helps to regulate body temperature by evaporating from the skin's surface.
  • Digestive juices, including saliva, gastric juices, and pancreatic juices, aid in the digestion and absorption of nutrients from the foods we eat.

Maintaining proper hydration is crucial for maintaining the health and function of body fluids. Dehydration can occur when the body loses more fluids than it takes in, leading to a variety of symptoms including thirst, dry mouth, and fatigue. On the other hand, overhydration can also be harmful to the body, leading to an imbalance of electrolytes and other important nutrients.

Get CPR Certified in Minutes for as low as $19.95

Join thousands of professionals that have been certified online with us
100% Online Certification
Fast & Convenient
Instant Certification Card
Nationally Accepted
Get Started
5 star
from 259,205 reviews


Tailored for the community and workplace
Offer Expires:
Comprehensive CPR Training Across All Ages
Choking response training
Recovery position technique course


  • National Institutes of Health. Body Fluids. Retrieved from
  • Cleveland Clinic. Body Fluids: What They Do and Why They're Important. Retrieved from
  • MedlinePlus. Body Fluids. Retrieved from