Explain why tissues in multicellular organisms are supplied with nutrients using a circulatory system.

The tissues in a multicellular organism requires a circulatory system in other to deliver oxygen and food to the tissues while also removing carbon dioxide and metabolic wastes due the complexity of these activities

Explanation:

Multicellular organisms are organisms that are made of more than one cell. the more cells an organism has the more complex certain activities might be for the organism hence the tissues in a multicellular organism requires a circulatory system in other to deliver oxygen and food to the tissues while also removing carbon dioxide and metabolic wastes

when it gains or loses electrons

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle