NATS 1675 Study Guide - Midterm Guide: Fibrin, Surface Tension, Standard Anatomical Position

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The second most common form of the water molecule on our planet is ice. Most animals and plants contain more than 60% water by volume. Atomic structure of water: h side = (+, other side = (-) Powerful solvent due to molecular polarity: and strong surface tension. When the water molecule makes a physical phase change its molecules arrange themselves in distinctly different patterns: ordered = frozen, semi ordered = liquid, random = vapour. Used to dissolve molecules chem rx occur. Organism moved to land = carried h2o. The physical & chemical properties of liquid water make life possible: 1. The capacity to dissolve or repel substances: cohesiveness, temperature-stabilizing effects, always in flux transports materials, in a liquid form over range of temperature from 0-100 c. Covalent bonds: non-polar = sharing e-equally. Methane (ch4: polar= do not share e- Hydrogen bond: weakest bond, h(+) attracted to polar covalent (-) molecule.

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