How does a sperm whales body adjust to hydrostatic pressure?

Explanation:

Sperm whales can dive down to 2000m which is 200 atmospheres in pressure on top of its body. Whales access reserve oxygen in its blood and muscles – not from the air in its lungs. Whales have more than 2x the hemoglobin in their blood as humans have and 10x the myoglobin. A SPERM WHALE can dive down more than 2,000 meters and can stay submerged for up to an hour. Some sea creatures exploit great depths.

Spermaceti and Diving Capabilities :

One common theory is that the fluid—which hardens to wax when cold—helps the whale alter its buoyancy so it can dive deep and rise again. Sperm whales are known to dive as deep as 3,280 feet in search of squid to eat.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

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explanation: