Platelets have a nucleus and platelets are living cells

Platelets, also known as thrombocytes, are megakaryocytes in the bone marrow.

The mass is detached from the small pieces, so there is no nucleus.

Blood platelet, abbreviation: PLT. It is a mammal.

The formed fraction in the blood is a small biologically active piece of cytoplasm that is detached from the cytoplasm of mature megakaryocytes in the bone marrow. Small size, no nucleus, no regular shape, (100 300) 10 9 l, diameter 2-3 μm. Platelets are seen as non-functioning cellular debris in the blood in the long term.

Platelets have a specific morphological structure and biochemical composition, and there is a relatively constant number in normal blood (for example, the number of platelets in a person is 10.3 million per cubic millimeter), which is important in hemostasis, wound healing, inflammatory reaction, and thrombosis.

and organ transplant rejection and other physiological and pathological processes. Platelets are only found in mammalian blood. There is no nucleus structure, i.e., there are no chromosomes.

It was not until 1882 that the Italian physician J B Bizzozerol discovered that they played an important role in the process of hemostasis after vascular injury, that the naming of platelets was first proposed.

The lower vertebrates have spindle cells that act as coagulation, and the fish class begins to have specific thrombocytes. Amphibians, reptiles, and avians have thrombocytes in their blood, and thrombocytes are spindle-shaped or oval-shaped cells with a nucleus that function similarly to platelets. Invertebrate.

There are no specific thrombocytes, such as mollusks.

The amoebocytes have both defensive and traumatic effects. Crustaceans have only one type of blood cell.

It also has a coagulation effect.

Platelets are disc-shaped, ranging in diameter from 1 4 μm to 7 8 μm, and vary widely from person to person (5 12 m3 μm). Platelets are motile and deformed, so they are polymorphic when observed by conventional methods. The platelet structure is complex, in short, it is a three-layer structure from the outside to the inside, that is, the outer layer is composed of the outer membrane, the unit membrane and the submembrane microfilament structure. The second layer is a gel layer, and the microfilaments and microtubules parallel to the surrounding area can be seen under the electron microscope. The third layer is a micro-organ layer, with mitochondria, dense bodies, residual nuclei and other structures.

Nope. The cytoplasm of platelets is pale blue, and the nucleus is gone—platelets themselves are formed by the shedding of the cytoplasm of mature megakaryocytes in the bone marrow.

Platelets do not have a nucleus. Platelets are non-cellular structurally viable bodies produced by cytoplasmic shedding of mature megakaryocytes within the bone marrow and have a lifespan of 7 to 14 days. Normal people have not undergone anticoagulation whole blood, and the platelets after Wright's staining are often clustered in piles, and the single platelet cell body is round, oval or irregularly shaped, with a diameter of 2-5 microns, the cytoplasm is light blue or light red, and small azurinous particles are gathered in the cells**.

The difference in the size of platelets in normal people is very large, which can be divided into 4 types: small, medium, large and giant, the diameter of small platelets is less than 2 microns, the diameter of medium-sized platelets is between microns and microns, the diameter of large platelets will be greater than microns, and sometimes there may be giant platelets, which can reach the size of white blood cells.

Yes There is no nucleus of red blood cells.

Platelets are the smallest blood cells in the body. It survives for 14 days in circulating blood.

Platelets are indeed small. Platelets are 2 4 m (microns) in diameter, thick, and oblate bodies with refraction. It is normally disc-shaped, and sometimes protruding pseudopodia.

On Wright-stained blood smears, platelets are often grouped in groups and uneven in size, round, oval, or irregular in shape, seedless, pale blue cytoplasm, and contain purplish-red granules. Some people divide it into four types: large, medium, small and deformed, with medium accounting for 40% and 50%.

Platelets develop from the cytoplasm of the largest blood cell, the bone marrow mature megakaryocytes.

The function of platelets is mainly to promote hemostasis and accelerate blood clotting, and platelets also have the function of maintaining the integrity of the capillary wall.

In the process of hemostasis and coagulation, platelets have the functions of forming blood clots, blocking wounds, and releasing various factors related to coagulation.

Abnormal platelet quantity and quality can cause bleeding disorders. Decreased numbers are seen in thrombocytopenic purpura, hypersplenism, aplastic anemia, and leukemia. Increased numbers are seen in conditions such as essential thrombocythemia and polycythemia vera.

Mass abnormalities may be seen in platelet weakness.

Platelets, also known as thrombocytes, are small pieces of megakaryocytic cytoplasm shed from the bone marrow, so there is no nucleus, and there is an intact cell membrane on the surface Platelets have no nucleus, and the cytoplasm is light blue and contains purplish-red granules.

In prokaryotes, there is no nuclear membrane-coated nucleomimetry, but platelets do not even have a nucleometre, so they cannot be prokaryotic cells.

However, it is important to note that platelets are formed by the differentiation of hematopoietic stem cells, which are eukaryotes.

Then platelets must be eukaryotes.

Yes, to be precise, platelets are biologically active cell fragments that are shed from monocyte macrophages, not strictly independent cells, and play a role in the coagulation process.

My book says that platelets are living cells that are cytoplasmically lysed and shed from mature megakaryocytes in the bone marrow. Colorless, nucleus-free. It is oval, rod-shaped, or irregular. Although platelets are nucleated, the cytoplasm contains a variety of active factors related to their function.

Platelets were considered non-functional cellular fragments in the blood for a long time, and it was not until 1882, when the Italian physician Bizzozero, discovered that they played an important role in the process of hemostasis after vascular injury, and the naming of platelets was first proposed.

On the question of whether platelets are considered blood cells, they are present in blood components and play a very important role, and they are still taught as blood cells in teaching.

Platelets aren't blood cells, they're just small pieces of cytoplasm shed by megakaryocytes in the bone marrow, and basically all major medical (histology and embryology) textbooks don't consider platelets to be cells.

Platelets are not blood cells, but a formed component of the blood.

Because, platelets do not have the complete morphology of the cells, just fragments of some cytoplasm.

Yes, in blood, platelets are the smallest cells. Platelets are shaped like an olive or disc under an electron microscope, and they are also fusiform or irregularly shaped. Platelets are microns long and microns wide.

A normal person has 10.3 million platelets per cubic millimeter of blood, with an average of 200,000, and 1.3 platelets are usually stored in the spleen.

The main function of platelets is to coagulate and stop bleeding, and to repair broken blood vessels. The lifespan of platelets averages 7-14 days.

When a human body bleeds from an injury, platelets rush in groups to close the wound and stop bleeding within seconds. Platelets and other clotting substances in the blood—calcium ions and thrombin—aggregate on the walls of broken blood vessels, forming blood clots, blocking broken wounds and blood vessels. Platelets also release adrenaline, which causes vasoconstriction and promotes hemostasis.

Platelets are considered non-functioning cellular fragments in the blood for a longer period of time. It was not until 1882, when the Italian physician J. B. Bizzozero, discovered that they played an important role in the process of hemostasis after vascular injury, and the naming of platelets was first proposed. Platelets have been found to be small pieces of cytoplasm shed from megakaryocytes in the bone marrow, each of which produces 3,000 to 4,000 platelets.

Various diseases that attack the bone marrow and cause low hematopoietic function will affect the quality and quantity of platelets. When the platelet count is low, bleeding can easily occur.