Question

Compare the composition of blood, tissue fluid, and lymph?

Answer 1

The distribution of body fluids within the human can be categorized into intracellular and extracellular fluids. Intracellular fluid is the fluid within cells primarily defined as the cytoplasm of cells. The extracellular fluid is the fluid outside the cells, and it is further subcategorized into the interstitial fluid, blood, lymph, cerebrospinal fluid, pericardial fluid, peritoneal fluid, semen, milk, etc.

Complete answer:
Blood is an intravascular body fluid flowing through the blood vessels (arteries, veins, capillaries, venules, etc) of the circulatory system. It consists of plasma and formed elements. While tissue fluid is the extracellular fluid found outside the cells of tissues. Lymph or lymphatic fluid is the body fluid that flows through the lymphatic vessels of the lymphatic system. The comparison of the composition of these extracellular fluids are given below,

Composition	Blood	Tissue fluid	Lymph
Cells	Red blood cells or erythrocytes, white blood cells or leukocytes (neutrophils, eosinophils, basophils, monocytes, and lymphocytes), and platelets or thrombocytes.	Phagocytic white blood cells such as neutrophils and monocytes (macrophages). Their concentration is elevated, especially in infected areas.	Lymphocytes (B cells and T cells)
Water	Present	Present	Present
Glucose	High	Low	Low
Amino acids	High	Low	Low
Fats	Present and some transported as lipoproteins.	Absent	Comparatively more and absorbed by lacteal (lymphatic vessel presents in the intestine).
Proteins	Hormones and plasma proteins such as albumin, globulin, and fibrinogen	Some hormones and proteins secreted by cells	Only a few proteins, namely immunoglobulins.
Salts and ions (each with specific concentrations)	Present	Present	Absent
Oxygen	High	Less	Less
Carbon dioxide	Low	High	High

Note:
Blood helps in transporting nutrients and oxygen to the cells and metabolic waste products, carbon dioxides away from the same cells. Tissue fluids are fluids present in the intracellular space that is formed from the diffusion and filtration of plasma from the blood. It helps the exchange of substances between the blood and the cells. In comparison, lymph fluid mainly contributes to immunity, and it also maintains fluid balance within the human body.