The lymphatic system plays a crucial role in immune function, fat absorption, and fluid balance in the body. It helps to remove waste, toxins, and excess fluid from tissues, and transports immune cells to fight infection and disease.

Blood plasma is the fluid component of blood that contains proteins and other substances, while lymph is similar to plasma but lacks the red blood cells and is colorless with fewer proteins.

Lymph carries digested and absorbed fat from the intestine and drains excess fluid from the extracellular space back into the blood, helping to maintain fluid balance in the body.

Lymphatic capillaries collect the tissue fluid or lymph from the intercellular spaces in tissues. These capillaries join to form larger lymph vessels, which eventually empty into larger veins.

Lymph is a fluid similar to plasma but colorless and with fewer proteins. It forms when plasma, proteins, and blood cells escape through pores in the capillary walls into the intercellular spaces in tissues.