Skip main navigation

The human blood

The human blood carries out various important functions for the body. Read on to find out why they are important.
© Universiti Malaya

What is blood?

Blood is the life-maintaining fluid that circulates through the entire body. Blood delivers essential substances like oxygen and nutrients to the body’s cells. It also transports metabolic waste products away from those same cells.

What is the function of blood?

Blood carries the following to the body tissues:

  • Oxygen
  • Immune cells (cells that fight infection)
  • Vitamins
  • Antibodies
  • Nourishment
  • Electrolytes
  • Hormones
  • Heat

Blood carries the following away from the body tissues:

  • Waste matter
  • Carbon dioxide
© Universiti Malaya
This article is from the free online

Human Blood and Blood Functions

Created by
FutureLearn - Learning For Life

Our purpose is to transform access to education.

We offer a diverse selection of courses from leading universities and cultural institutions from around the world. These are delivered one step at a time, and are accessible on mobile, tablet and desktop, so you can fit learning around your life.

We believe learning should be an enjoyable, social experience, so our courses offer the opportunity to discuss what you’re learning with others as you go, helping you make fresh discoveries and form new ideas.
You can unlock new opportunities with unlimited access to hundreds of online short courses for a year by subscribing to our Unlimited package. Build your knowledge with top universities and organisations.

Learn more about how FutureLearn is transforming access to education