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The alveoli have a number of adaptations for effective gaseous exchange. Firstly, they have a very large surface area to volume ratio; the combined surface area of the alveoli is approxim...

ATP (adenosine triphosphate) is the energy-carrying molecule used in cells. It is produced by mitochondria during aerobic respiration via the tricarboxylic acid (TCA) cycle. Additionally, it is also produ...

Many mitochondria which release lots of energy allowing it to swim.Flagellum (tail) which allows it to swim to the egg.Enzymes in the head which allow it to digest the egg cell membrane.

Osmosis is the diffusion of water molecules from a low solute concentration to a high solute concentration across a partially permeable membrane.

Osmosis is the diffusion of water molecules from an area of high water potential to low water potential, across a selectively/ permeable membrane. + diagram on whiteboard