The knee is an example of a simple machine in the human body. true or false

True

Explanation:

Human body is a complex machine which consists of many small machines which can be considered as body parts.

Knee can be one of the example of a simple machine which works by helping the body in walking, folding of legs, movement of legs.

Hence, the given statement is true that knee can be a simple machine in human body.

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.