Which tissues have the highest rate of mitosis?

Which tissues have the highest rate of mitosis?

Skin cells, hair follicles and the cells lining our intestines (epithelial cells) all have high rates of mitosis as these tissues constantly need to be replaced. In plants growth occurs largely at the shoot and root tips. These cells have much higher rates of mitosis than the rest of the plant.

Which type of tissue has a higher mitotic index normal or cancerous?

Durations of the cell cycle and mitosis vary in different cell types. An elevated mitotic index indicates more cells are dividing. In cancer cells, the mitotic index may be elevated compared to normal growth of tissues or cellular repair of the site of an injury.

Which tissue has the greatest rate of cell division?

Holocrine glands have the highest rate of cell division. The secretory cells fragment and are lost in the secretion; thus the secretory cells must be continuously replaced.

Where in your body is mitosis occurring at the fastest rate?

This means, in humans, the fastest rate of mitosis happens in the zygote, embryo and infant stage. A high rate of mitosis is required to grow and repair tissue, such as in human lymph nodes and bone marrow.

Which cells undergo mitosis at a rapid rate?

The cells like epithelial cells that reproduce rapidly will have rapid rates of mitosis. The epithelial cell will divide rapidly by mitosis and will replace the damaged cells in the torn upper epithelial layer.

What is considered a high mitotic index?

The mitotic thresholds, as suggested by Perry and coworkers,3 were adopted by the WHO as an objective grading criterion: benign (WHO grade I) menin- giomas do not exceed 4 mitoses per 10 HPF, atypical (WHO grade II) meningiomas exhibit an MI of 4 or more and fewer than 20, and anaplastic (WHO grade III) meningiomas …

What does the mitotic index represent?

In a population of cells, the ratio of the number of cells undergoing mitosis (cell division) to the number of cells not undergoing mitosis.

What is a high mitotic rate?

The higher the mitotic count, the more likely the tumor is to have metastasized (spread). The logic is that the more cells are dividing, the more likely they will invade the blood or lymphatic vessels and thus spread around the body.

Which cells divide the fastest?

Basal cells divide faster than needed to replenish the cells being shed, and with each division both of the two newly formed cells will often retain the capacity to divide, leading to an increased number of dividing cells.

Where would you find the greatest concentration of undifferentiated cells in a plant?

apical meristem: the tissue in most plants containing undifferentiated cells (meristematic cells), found in zones of the plant where growth can take place at the tip of a root or shoot.

Where does mitosis occur most in the human body?

Mitosis occurs rapidly in the growing regions, the dermis of the skin, where cells are replaced continuously, the region of wound healing, etc.