In one minute. But we all learned that in what? 5th Grade? Oh and spell *to* right u F*ck. It's not *yo* you dumba$$.
red blood cells are replaced ever 120 days, so therefore are replaced 3 times a year
Red blood cells have a lifespan of about 120 days. If it takes about 120 days for all red blood cells to be replaced once, then it would take approximately 1200 days (120 days x 10) for them to be replaced 10 times in your body. This is roughly equivalent to 3.3 years.
Skin cells on the body typically live for about 2-4 weeks before they are shed and replaced.
Red and white blood cells are both made in the marrow of the long bones.
in long bones
The human blood cell on average lives for apx. 120 days. once it dies it has to be replaced.
90 to 120 days
120 days for a normal rbc. a sickle cell lasts only about 20 days
Fresh blood typically lasts for about 42 days in the body before it gets replaced with new blood cells. However, if you're asking about how long fresh blood can be stored outside the body, it can be refrigerated for up to 42 days or frozen for up to 10 years. Just don't go trying to stock up on blood like it's a pantry item, okay?
It varies dramatically depending on what type of cell it is. For example, blood cells and skin cells are constantly being replaced, so they don't live for very long. However, your brain and nerve cells NEVER get replaced, so they live until you die. That's why if you hurt your spine in, for example, a car wreck, you are likely paralyzed for life, whereas if you scrape your skin it will grow back.
Most blood cells, including red blood cells, white blood cells, and platelets, are produced in the bone marrow of a human body. The bone marrow is found in the cavities of bones such as the pelvis, sternum, and long bones.
If by 'replaced' you mean, can the body grow new ones like with blood and tissue cells, then no, not at present. There is some promising research being done with stem-cell therapies, but they're a long way from being able to effectively regrow nerve tissue.