Comparison of human blood and frog blood.

The blood of both humans and frogs consists of a liquid part – plasma and corpuscles (cells – erythrocytes, leukocytes and platelets). The difference in the structure of their blood is associated with red cells – erythrocytes, which carry oxygen. In a frog, they are larger, oval in shape and have nuclei. In humans, erythrocytes are smaller, without nuclei, and the shape is in the form of a biconcave disc. The consequence of this difference is that in the same volume of blood in a person, the total area of oxygen attachment will be much larger.