What is hemolymph?

What Does hemolymph Mean

The haemolymph is a fluid that circulates inside of some invertebrate animals . It is a liquid that, due to its characteristics, is equivalent to the blood of vertebrates.

The properties of the hemolymph vary by species . It can be transparent, green or orange, since its pigmentation in some cases comes from metabolism and in others, it is a consequence of food.
Both organic and inorganic substances appear in the composition of the hemolymph. It is possible to find proteins , amino acids , carbohydrates , lipids and water .

In hemolymph, on the other hand, there are different kinds of cells . Among the functions of these cells are the transfer of oxygen, hormones and nutrients; coagulation; and thermoregulation. It also affects the processes of the immune system, contributing to defense against the action of microbes.
Another function of the hemolymph is to exert different pressures to promote the development or metamorphosis of insects. The irrigation of the hemolymph - and the pressure that the liquid exerts on the circulatory system - allows the butterflies to spread their wings, to mention one case.
It is important to note that, when it comes to insects , the circulatory system is open . Therefore, the organs directly receive the hemolymph, which circulates through a single blood vessel (although there are exceptions) with openings.
It is estimated that hemolymph can represent between 5% and 40% of the weight of an animal . This wide variation depends on the particularities that each species presents.

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