Alveolar collapse is an adaptation to reduce nitrogen absorption during deep dives.

What is the primary function of bradycardia during a marine mammal’s dive?

Beaked whales are most vulnerable to predation while at depth.

Most marine mammals exhibit spontaneous ovulation rather than induced ovulation.

Marine mammals can actively control gas exchange during a dive.

The penis of cetaceans is generally rigid and fixed in direction.

Why is blubber considered more than just fat in marine mammals?

Which anatomical adaptation allows gas exchange to cease at depth in deep-diving marine mammals?

Sound transmission in mysticetes might involve bone conduction through skull vibration.

Some species of beaked whales can remain submerged for over two hours.