There are three relationships between water and living things.

1. Water is the source of life. Without water, no living thing can survive; 2. Water is the foundation of organism and the medium of organism metabolism; Water plays various important roles in the reproduction of life. Its high specific heat and high vaporization heat make it a temperature regulator of organisms.

Introduction to water, chemical formula is H? O is an inorganic substance composed of hydrogen and oxygen, which is nontoxic and drinkable. At normal temperature and pressure, it is a colorless and odorless transparent liquid, which is called the source of human life. Water is one of the most common substances on the earth, an important resource for all life, including inorganic compounds and human beings, and the most important component of organisms.

Pure water has very weak conductivity and belongs to extremely weak electrolyte. Water in daily life has obvious conductivity because it dissolves other electrolytes and has more anions and cations.

Biological organism refers to a living body with kinetic energy and is also a collection of objects. Individual organisms refer to organisms, as opposed to abiotic organisms.

Its elements include: living beings with viability and reproductive ability produced by chemical reactions under natural conditions, and living offspring that can respond to external stimuli and rely on and promote each other with the external environment through reproduction. But also can excrete useless substances in the body, which has the characteristics of heredity and variation.