what is difference between plasma and red blood cells?

Expert Answers

An illustration of the letter 'A' in a speech bubbles

Erythrocytes, or red blood cells are donut shaped blood cells which lack a nucleus when mature and are constantly being replaced by the bone marrow and spleen. They contain hemoglobin, a red pigment that is able to transport oxygen as oxyhemoglobin to all parts of the body. Red blood cells make up about 45% of the blood. Plasma, is the liquid component of the blood. It is straw colored and contains mainly water. It makes up 55% of the blood. It is approximately 2.8-3.2 quarts. Besides the 92% water, the rest of its composition is 8% blood plasma proteins and other trace materials. Dissolved nutrients are found in plasma as are wastes such as carbon dioxide, urea and lactic acid.

Approved by eNotes Editorial Team

We’ll help your grades soar

Start your 48-hour free trial and unlock all the summaries, Q&A, and analyses you need to get better grades now.

  • 30,000+ book summaries
  • 20% study tools discount
  • Ad-free content
  • PDF downloads
  • 300,000+ answers
  • 5-star customer support
Start your 48-Hour Free Trial