The animal tissue is composed of small units called animal cells, where each cell contains many components, The animal cells are of various sizes and have irregular shapes, and most of the cell size...
The plant tissue (as the epidermis tissue of the onion leaf) is composed of small units known as the plant cells, where each cell contains many components, The plant cell is the eukaryotic cell...
The systems are composed of the organs, the organs are composed of tissues, and the tissues are composed of the cells, The cell is the building unit of the living organism’s body, and it...
Any changes in our lifestyle and environment are responsible for poor respiratory system health, It is very important to keep our respiratory system healthy to keep away from diseases that affect our health.
