Information About Blood and Circulation System Of Insects


How does the Blood and Circulation system of insects work? Information About Blood and Circulation Sytem Of Insects


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The blood of insects is primarily concerned with distributing food molecules to the body cells and removing their metabolic wastes. In many insects the blood is yellowish or greenish, but in the larvae of midges and a few other insects the blood is red because it contains the oxygen-carrying pigment hemoglobin. In these insects the blood also serves to carry oxygen to the body cells.


The circulatory system of insects is said to be an open system because the blood fills the general body cavity and there are only a few lood vessels. The chief blood vessel is a simple tube that lies above the digestive tract. The back portion of the tube is called the heart and it is divided into a series of chambers by several valves. Blood from the body cavity enters these chambers through small openings and, once inside the heart, the blood is pumped into the front portion of the tube by the contraction of muscles surrounding the heart. The front portion of the tube, the aorta, carries the blood to the head where it is released. The blood then flows sluggishly back to the general body cavity, bathing the various tissues and cells.



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