Question

Опишите функции конечностей рака пожалуйста)))

Answer 1

Головагрудь
брюшко
......................

Answer 2

Головагрудь и брюшко состоят из одинаковых сегментов,каждому из которых,соответственно пара членистых конечностей,специализированных к выполнению определенной функции.речной рак имеет след. конечности:сегменты головагруди несут 13 пар конечностей
антеннулы (органы обоняния)антенны(органы осязания)
верхние челюсти и 2 пары нижних челюстей,3 пары ногочелюстей,5 родильных ног
1 пара ходильных ног преобразован в клешни,на брюшке 6 пар конечностей,5 пар плавотельных ног
конечности 6 и 7 сегментов вместе образуют хвостовой плавник

Answer 3

Functions of Cancer Cells

Cancer cells are abnormal cells that divide and grow uncontrollably, leading to the formation of tumors. The functions of cancer cells can vary depending on the type and stage of cancer. Here are some general functions of cancer cells:

1. Uncontrolled Cell Growth and Division: Cancer cells have lost the ability to regulate their growth and division. They divide rapidly and continuously, leading to the formation of tumors.

2. Invasion and Metastasis: Cancer cells have the ability to invade nearby tissues and spread to other parts of the body through a process called metastasis. They can break away from the primary tumor, enter the bloodstream or lymphatic system, and establish secondary tumors in distant organs.

3. Angiogenesis: Cancer cells can stimulate the formation of new blood vessels, a process known as angiogenesis. This allows them to receive a constant supply of oxygen and nutrients, promoting their growth and survival.

4. Evasion of the Immune System: Cancer cells can evade the immune system's surveillance and destruction. They may develop mechanisms to avoid recognition by immune cells or suppress the immune response, allowing them to continue growing unchecked.

5. Genetic Instability: Cancer cells often have genetic mutations that result in genetic instability. This instability can lead to further mutations and alterations in the cancer cells' DNA, contributing to their ability to grow and survive.

6. Resistance to Cell Death: Cancer cells can develop resistance to programmed cell death, known as apoptosis. This allows them to survive and continue proliferating even in unfavorable conditions.

7. Altered Metabolism: Cancer cells often exhibit altered metabolism compared to normal cells. They may rely on different energy sources and metabolic pathways to support their rapid growth and division.

It's important to note that the functions of cancer cells can vary depending on the specific type of cancer and individual characteristics. Cancer is a complex disease, and researchers continue to study and uncover more about the functions and behavior of cancer cells.

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