After the palm of the hand is cut, how do the blood vessels in the flesh grow together?

When you are cut, these are the blood vessels and flesh on the surface, and it will continue to grow new ones, and then it will continue to heal after slowly connecting them.

After the palm of the hand is cut, the blood vessels in the flesh are first coagulated together by platelets, and then the blood vessels repair themselves, and after the repair is completed, they are back together!

There are four phases in total:1Stop bleeding from the wound to prevent further blood loss 2Inflammation 3Protein diffusion4The new organization comes in the form of the original organization, which is called remodeling.

The blood vessels in the human hand are very abundant, if a laceration occurs, the capillaries do not need to grow new ones directly, and the abundant capillaries can ensure the blood of the tissues on both sides of the rupture**. Large, severed blood vessels require surgical butt sutures.

Why are capillaries called capillary networks, because their structure is quite simple, the blood vessel wall is only composed of one or two layers of epithelial cells, connected between the arterioles and the venules, the main role is to transport oxygen and nutrients to all tissues of the body, take away metabolic wastes, so there are abundant capillaries in all tissues throughout the body.

The connection between the capillaries also makes the oxygen and other substances of the tissues abundant, the left to the right, the upper and the lower sides, so when the biological tissue is torn, the tissues on both sides can be made of undamaged capillary ** substances, and the blood vessels do not need to grow together. A "bridging" is also formed between the thicker blood vessels, which can be transported from the adjacent blood vessels when the tissue oxygen consumption is increased or blood loss, and there is no need for special butt sutures after disconnection, and it is also necessary to grow new ones.

In fact, due to the traction of muscle and tissue tension after tissue tearing, the tissues on both sides will be deformed and displaced, and the capillaries on both sides cannot repair and re-dock by themselves, and the difficulty of manual docking is almost impossible, so there is no docking step for small blood vessels in the corresponding bandaging procedure. It is more troublesome to dissociate large blood vessels, and there are generally special operation steps for butt suture.

The role of thick blood vessels is irreplaceable for capillaries, and the postoperative recovery of a large amount of blood loss due to the disconnection of thick blood vessels will cause muscle atrophy, because its oxygen supply and other energy supply will be affected, which is why some people with severe fractures have two legs that are not the same thickness after recovery, of course, it is also related to the reduction in the use of muscles and the long recovery time of fractures. Larger nerve bundles also require docking procedures to better ensure postoperative functional recovery. Thick blood vessels, especially arteries, are developed because of the smooth muscles of the blood vessel walls, and if they are severed, they may retract into the muscles, causing trouble for first aid.

If there is a trauma in life, blood loss can be reduced by compression, venous pressure on the distal limb side of the heart, and arterial blood vessels need to be pressed on the proximal heart.

In the process of tissue repair, the blood on both sides of the wound first starts the coagulation program, fills the broken small blood vessels, so that the bleeding stops, and then the cells proliferate in the wound to form granulation tissue, and at the same time form new capillaries to the granulation tissue, this period due to the regrowth of tissues and nerves, the wound will be very itchy, and finally the surrounding cells produce fibrous tissue to fill the wound and repair it completely, forming a scar, and the type and number of cells in the scar are less than normal tissue.