In cetology, the study of whales and other cetaceans, a blowhole is the hole (or spiracle) at the top of the head through which the animal breathes air. In baleen whales, these are in pairs. It is homologous with the nostril of other mammals, and evolved via gradual movement of the nostrils to the top of the head. [1]

2020年9月5日 · The purpose of having their blowhole on top of their head is for the convenience of not having to lift their entire head out of the water to get a breath. In fact a whale can’t even breathe through its mouth it can only breathe through its blowhole. Its mouth is just used for eating, nom nom nom.

Why is a blowhole on the top of a whale's head and what does their exhaled breath smell like?

2017年10月24日 · If you ever watch a whale breathe, you'll see plumes of mist shoot out of a hole in its head. Contrary to popular belief, that's not seawater.

Blowhole – the hole on the top of the head through which the whale breathes air. Box-like head – the sperm whales head is shaped like a box . Conical teeth – the sperm whale has huge, conical teeth in the lower jaw (they fit into sockets in the upper jaw).

2021年8月5日 · In fin whales, the skull folded in a region in the back of the skull, near where the skull joins with the vertebral column. In the pantropical spotted dolphin, the folding is centered near the middle of the skull.

2008年3月18日 · In most mammals, the nose opening is located near the tip of the snout. In modern dolphins, on the other hand, it is located on the top of the head, above the eyes. It is called the blowhole. In development, the nose opening shifts from the tip of the snout (arrow in left embryo) to its position on top of the head.

2022年10月19日 · The blowhole is located on the top of the whale’s head, just behind the whale’s forehead. When the whale dives, it exhales all the air from its lungs and then closes the blowhole. This prevents water from entering the lungs. The whale can stay underwater for up to an hour before it needs to surface to breathe.

2021年8月16日 · New research is shedding light on how the nasal passage of dolphins and whales shifts during embryonic development from emerging at the tip of the snout to emerging at the top of the head as a...

Blowholes are a whale's nostrils and are located on the top or back of the whale's head. Blowholes are covered by muscular flaps that keep water from entering them when the whale is under water. In the relaxed state, the flap covers the blowhole. A blowhole leads to the whale's trachea and then to its lungs.