Biological systems Sperm whale

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the arterial system of sperm whale foetus.


in 1959, heart of 22 metric-ton (24 short-ton) male taken whalers measured 116 kilograms (256 lb), 0.5% of total mass. circulatory system has number of specific adaptations aquatic environment. diameter of aortic arch increases leaves heart. bulbous expansion acts windkessel, ensuring steady blood flow heart rate slows during diving. arteries leave aortic arch positioned symmetrically. there no costocervical artery. there no direct connection between internal carotid artery , vessels of brain. circulatory system has adapted dive @ great depths, as 2,250 metres (7,382 ft). myoglobin, stores oxygen in muscle tissue, more abundant in terrestrial animals. blood has high density of red blood cells, contain oxygen-carrying haemoglobin. oxygenated blood can directed towards brain , other essential organs when oxygen levels deplete. spermaceti organ may play role adjusting buoyancy (see below). arterial retia mirabilia extraordinarily well-developed. complex arterial retia mirabilia of sperm whale more extensive , larger of other cetacean.








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