Fibrous connective tissues like ligaments and tendons as well as bones, cartilage, and nerves tend to take the longest to heal.
The mouth is the fastest healing organ, according to Brand et al. (2014). This is due to the presence of saliva, that moisturizes the wound, improves immune response to wound healing, and contains other wound-healing promoting factors.
The scaphoid bone is located on the thumb side of your wrist, close to the lower arm bones. It is shaped like a cashew, which makes it hard to visualize on the x – ray. The reason scaphoid fractures have a hard time healing is due to the anatomy of the blood supply to the bone.
Cartilage is avascular, meaning that it has no blood supply. The lack of blood circulation in cartilage means that it is a very slow-healing type of tissue.
The liver has a unique capacity among organs to regenerate itself after damage. A liver can regrow to a normal size even after up to 90% of it has been removed. But the liver isn't invincible. Many diseases and exposures can harm it beyond the point of repair.
Teeth are the ONLY body part that cannot repair themselves. Repairing means either regrowing what was lost or replacing it with scar tissue. Our teeth cannot do that. Our brain for example will not regrow damaged brain cells but can repair an area by laying down other scar-type tissue .
Fibrous connective tissues like ligaments and tendons as well as bones, cartilage, and nerves tend to take the longest to heal.
Labile tissues have stem cells like epithelial cells and hematopoietic cells, and differentiated cells in the tissue are continuously renewed by stem cells. Although labile tissues are easily damaged, they are also easy to repair by way of regeneration, in which lost cells are simply replaced, he said.
The second-hardest tissue in the body, after enamel, is dentine, which serves as the tooth's primary support structure.
The ability of muscle tissue to regenerate is limited. Fibrous connective tissue often replaces damaged muscle tissue. Nerve tissue has even less capacity to regenerate as the cell division in the nervous tissue is restricted to the early stages of development.
The Femur is often put at the top of the most painful bones to break. Your Femur is the longest and strongest bone in your body, running from your hip to your knee. Given its importance, it's not surprising that breaking this bone is an incredibly painful experience, especially with the constant weight being put on it.
A nonunion, delayed union, or malunited fracture may occur in any bone, but these conditions are most common in the humerus, or upper arm, and the tibia, or lower leg. Symptoms of a fracture that is not healing normally include tenderness, swelling, and an aching pain that may be felt deep within the affected bone.
A skin wound that doesn't heal, heals slowly or heals but tends to recur is known as a chronic wound. Some of the many causes of chronic (ongoing) skin wounds can include trauma, burns, skin cancers, infection or underlying medical conditions such as diabetes.
Your heart pumps out about 70 milliliters (two ounces) of blood every time it beats. And it does this over three billion times in the average person's lifetime.
The only part of the body that has no blood supply is the cornea in the eye. It takes in oxygen directly from the air.
The cornea is the only part of a human body that has no blood supply; it gets oxygen directly through the air. The cornea is the fastest healing tissue in the human body, thus, most corneal abrasions will heal within 24-36 hours.
Hyaline cartilage (Figure 6) is the most common — and the weakest — and is found in the ribs, nose, larynx, and trachea. It appears glassy in histological slides.
After diamonds, tooth enamel is the second hardest compound in the world. The hardest substance in the body is tooth enamel, your teeth's natural defence system. The only naturally occurring substance harder than tooth enamel is diamond. Tooth enamel is the hard white substance covering the crown of a tooth.
A few types of tissue are composed of cells that have left the cell cycle permanently, and are therefore unable to proliferate. These nondividing tissues (or permanent tissues) include cardiac and skeletal muscle. Tissue repair in these tissues always leaves permanent evidence of injury, such as a scar.
Tissues that have limited ability to regenerate include bone, cartilage, and smooth muscle (such as the muscles around the intestines). Tissues that rarely or never regenerate include the nerves, skeletal muscle, heart muscle, and the lens of the eye. When injured, these tissues are replaced with scar tissue.
Answer and Explanation: The type of epithelial tissue that is least protective would be non-keratinized stratified squamous epithelial tissue. This means the tissue is made of squamous epithelial cells, the thin, flat cells, that make a very thin layer.
Even when vascular collapse is the primary event, brain and lung functions stops next. The heart is the last organ to fail.
The organs more frequently affected are kidneys, liver, lungs, heart, central nervous system, and hematologic system. This multiple organ failure is the hallmark of sepsis and determines patients' course from infection to recovery or death.
Lungs are the most difficult organ to transplant because they are highly susceptible to infections in the late stages of the donor's life. They can sustain damage during the process of recovering them from the donor or collapse after surgeons begin to ventilate them after transplant.