Does a creature as small as a mosquito have a heart?

No, but the mosquito has a slightly bulging artery that also constricts to allow blood to flow, acting as a function of the heart.

Protozoa are single-celled organisms and do not have hearts. Before the phylum Chordates, there were no hearts, and only after cephalochordates did animals develop hearts such as fish, amphibians, etc. Flies, mosquitoes belong to arthropods and belong to the phylum Chordates so they do not have hearts.

Flies and mosquitoes are open tube circulating blood from the back of the heart after flowing out, through a section of arteries will run in the blood cavity, through the abdominal sinus, perivisceral sinus after returning to the sinus, through the heart hole and then into the ventricle, the heart is often tubular shaped, located in the back of the abdomen 1-9 segments, each section has a distended ventricle, each chamber has a heart hole, the blood is colorless, sometimes not yellow or green, no lungs with trachea for breathing.

Insectozoa such as flies and mosquitoes also have hearts.

Unlike the heart of a mammal, the heart of an insect has an open circulatory system, with blood circulating in the body cavity and bathing all tissues and organs. However, it also has the effect of pumping blood to drive blood circulation, also known as dorsal blood vessels, which are located above the insect's abdomen (back).

The circulatory system of insects mainly consists of the dorsal blood vessels, the accessory device, the dorsal diaphragm, and the ventral diaphragm, which drive blood circulation. The dorsal blood vessel is a long, slender canal that runs through the dorsal blood sinus** with an open anterior end and a closed posterior end. It is composed of muscle fibers and connective tissue, and is the main pulsatile organ of blood circulation.

The dorsal blood vessels can be divided into two parts: the artery and the heart. The artery is a thin, noncompartmental, anterior dorsal vessel with no hilum and no pterygoid muscle connected to the diaphragm. The anterior end is opened into the head cavity.

The posterior end connects to the 1st ventricle, which is the tube that directs blood to flow forward. The heart is a continuously enlarged part of the posterior part of the dorsal blood vessels, each of which is called a ventricle, and each ventricle is often flanked by a pair of hilums, and the ventricles are flanked by a fan-shaped transverse dorsal muscle connected to the diaphragm. The hilum is the passage through which blood enters the heart, and its edge folds inward to form the hilar valve.

When the ventricles contract, the hilar valve closes, forcing blood to flow forward within the dorsal blood vessels; When the ventricles are dilated, the hilar valve opens and blood flows from the body cavity into the ventricles. In this way, the ventricles contract sequentially from back to front, causing blood to flow from back to front in the dorsal blood vessels.

The human heart only pumps blood out of the same direction, but the mosquito heart is very special in that a tube is able to transport blood lymph (the equivalent of human blood) forward and backward.

Not only that, the biggest feature of the mosquito heart is that it has three such hearts on the back, and these three hearts have different functions, one is to supply blood to the head, one is to supply blood to the limbs and wings, and the other is to supply blood to the torso of the body.

Morphological characteristics of mosquitoes

Mosquitoes are divided into anterior, mesothorax, and posterior thorax. Each thoracic segment has 1 pair of feet, 1 pair of wings in the middle thorax, and 1 pair of balance rods in the hind thorax.

Characteristics of insects. There are 1 pair of valves in the middle chest and 1 pair of valves in the posterior chest. The mid-thoracic plate is particularly well developed, and its dorsal plate occupies almost the entire thoracic back, with the shields, small shields, and dorsal plates from front to back.

Culex mosquitoes. and the small shield of Aedes mosquito is trilobal-shaped, Anopheles mosquito.

The posterior edge of the small shield is arcuate. The mosquito wings are narrow and long, membranous. The wing veins are simple and covered with scales.

The hind edge of the wing has long scales, called wings. Scales can form pitting, spotting or streaks, which are an important basis for the classification of Anopheles mosquitoes. The mosquito feet are slender and are called forefeet, midfeet and hindfeet from front to back.

There are often black-and-white spots and rings formed by scales on the feet, which are important taxonomic features.

The above content refers to Encyclopedia - Mosquitoes.

Mosquitoes belong to the category of invertebrates and certainly do not have hearts.

Only mammals have hearts.

No, mosquitoes don't have organs yet.

Mosquitoes have hearts, but no one is as complicated as one, and it's a dorsal blood vessel that swells somewhere, and then it contracts and relaxes, to produce blood pressure. You can't live without a heart! So mosquitoes actually have hearts, but they look a little small, and we can't see them if we don't zoom in.

When you magnify the mosquito under a microscope to 400,000 times, you will be surprised to find that the mosquito is more powerful than Nezha, because it is not just three heads and six arms.

A mosquito under a microscope can see 100 eyes on its head, weighing one thousandth of a gram, 48 teeth in its mouth, and 3 hearts. One main heart, two hearts each supporting two wings! Each heart has two atria, two stomachs, and two lymphocyte valves.

Therefore, mosquitoes also have hearts, but they are beyond our imaginationBecause we never thought that a species could have 3 hearts, there is a feeling beyond our knowledge.

Each of the 3 hearts of mosquitoes has its own usefulness.

The work of the mosquito's three hearts is more complicated, one main heart is mainly to supply blood to its brain, and the other two hearts are to support the two wings, but at the same time, they also have to supply blood to the whole body, and can be carried out 5 times, why is this? This is because mosquitoes control the speed of their heartbeat to adapt to their surroundings!

No, there shouldn't be any insects.