BBC5 年
The difference between cells, tissues and organs
it is then explained how cells are adapted to their function. A group of cells working together is defined as a tissue and several tissues working together comprise an organ. The heart is used as ...
BBC4 个月
The difference between cells, tissues and organs
it is then explained how cells are adapted to their function. A group of cells working together is defined as a tissue and several tissues working together comprise an organ. The heart is used as ...