The percentage composition of blood is 55% blood plasma and 45% red blood cells.

The function of plasma is to maintain blood pressure and regulate body temperature.

The function of erythrocytes is to help transport oxygen from the lungs to the tissue and transport CO2 from the tissue back to the lungs and hemoglobin is a chemical that helps with the process.

Jaundice occurs when there is a build up of bilirubin in the liver mainly because there are too many red blood cells dying/ breaking down and going to the liver.

The function of albumin is to maintain homeostasis within the body.

The role of T-Cells in adaptive immune response is to kill infected virus cells instantly.

The thymus secretes a group of hormones called thymosins that affect the production and differentiation of certain white blood cells. The spleen filters substances in the blood.