All living things are made of cells which are differentiated to perform different functions ... circulatory system is essential for health. Blood transports substances around the body to every ...

Organ systems. And the organism itself. Cells are the building blocks of life. Tissue is made when specialised cells with the same function group ... hairs - cilia - on their surface that beat ...

Control at the cellular, tissue, organ system and whole-body levels is explained with reference to the basis of cell excitability, basic functions of the nervous system, muscle contraction, actions of ...

The main functions of this system are to provide structure and support to the body, protect vital organs and enable movement. In 2024, studies using more advanced methods to calculate the minimal ...