1. Chemical level – is the simplest level.
2. Cellular level – the cells.
3. Tissue level – epithelium, connective, muscle, and nervous tissue.
4. Organ level - brain, stomach, liver etc.
5. Organ system level – skeletal, nervous, muscular, endocrine, respiratory, lymphatic, digestive, urinary, and reproductive systems.
6. Organismal level – the human.
Объяснение:
1. Chemical level – is the simplest level.
2. Cellular level – the cells.
3. Tissue level – epithelium, connective, muscle, and nervous tissue.
4. Organ level - brain, stomach, liver etc.
5. Organ system level – skeletal, nervous, muscular, endocrine, respiratory, lymphatic, digestive, urinary, and reproductive systems.
6. Organismal level – the human.
Объяснение: