What is the largest mammal in history

Blue whale.

The largest mammal in the world is the blue whale. It weighs about 170 tons and can reach a length of about 30 meters. Newborn calves weigh tons and are meters long.

By the time the juvenile reaches 7 months, it can weigh about 23 tons and reach a length of 16 meters. The blue whale has an extremely large size, so that a tongue has 2000 kilograms, and the tongue can stand 50 people, according to research, the strength of the ordinary large blue whale is equivalent to the pull of a medium-sized locomotive, which can be called the "aircraft carrier" among animals.

Most of the bays inhabited by blue whales are flooded with abundant organic matter from the bright land river, which makes the water very fertile and promotes the abundance of plankton. Although the blue whale lives in the sea, like other mammals, it uses its lungs to breathe, which weigh more than 1,000 kilograms and can hold more than 1,000 liters of air. Blue whales are found in the oceans of the northern and southern hemispheres from the Antarctic to the North Pole, especially in the oceans near the Antarctic, but are less common in tropical waters.

Blue whales breed in winter, and female tenants generally give birth every 2 years, with a gestation period of 10-12 months, and only 1 litter per litter. The juvenile whale weighs about 2 and a half tons and is about 7 meters long. To prevent suffocation, the female lifts her cub out of the water to breathe the first breath of air, after which it can breathe on its own.

The largest mammal: the blue whale

Blue whales are very large in size and have an astonishing tonnage, with an adult blue whale weighing about 200 tonnes or so. Blue whales belong to the suborder of baleen whales, which mainly feed on shrimp, small fish, etc., and their respiratory system is the same as that of humans, which is lungs. But the human outlet grows on the face, which is our nose, while the blue whale's outlet grows on the top of the head.

The difference between whale breathing and humans:

1. The location is different. The outlet of a whale grows on the top of its head, and the outlet of a human grows on its face.

2. The concentration of hemoglobin is higher than that of humans. Whales have more than five times the concentration of hemoglobin in adult males, which ensures that whales can breathe in for up to two hours at the bottom of the sea, even if they breathe in their lungs.

Blue whale. 3. Myoglobin is not easy to aggregate. The main reason why humans cannot live in the ocean floor for long periods of time is that our myoglobin tends to accumulate, which leads to extremely high oxygen loss, and we breathe in a breath of oxygen for a short time to remain underwater.

However, the myoglobin of whales is not easy to huddle together, so the oxygen loss is very low.

Features of whale sleeping:

1. Short sleep time. Whales sleep for 1/16 of normal human sleep, and they sleep very lightly and for a very short time, which is why humans regard the images of whales sleeping as precious works.

2. The sleeping position is special. Whales generally sleep upright, basically do not sleep sideways, and sleep does not sink.

3. The frequency of sleep is very high. Whales are a kind of whale that can sleep on every day.

Twenty or thirty times for mammals.

The largest mammal among the animals on EarthIt's a blue whale.

The blue whale is a marine mammal belonging to the suborder Baleen Whales. There are four subspecies. The blue whale is believed to be the largest animal known to have ever survived on Earth, reaching up to 33 meters long and weighing up to 181 tons.

The blue whale has a slender body and a blue-gray back, although it can sometimes be lighter in the water.

Like other baleen whales, blue whales feed mainly on small crustaceans (such as krill) and small fish, sometimes including squid. Blue whales usually feed at depths of more than 100 meters during the day and come to the surface at night. Blue whales begin mating in late autumn and continue until late winter, with females usually giving birth every 2-3 years, and after a gestation period of 10-12 months, they usually give birth to calves in early winter.

It is distributed in all four oceans.

Mammals

A mammal is a homeothermic, vertebrate animal. Mammals have hair, most of which are viviparous, and feed their offspring through the mammary glands. Mammals are the most advanced stage in the history of animal development, and they are also the most closely related to humans.

The mammalian is dense, well-structured, has an important protective effect against decay, has good water permeability, controls body temperature and has a keen sensory function. In order to adapt to the changing external conditions, its texture, color, smell, temperature, etc. can be coordinated with the environmental conditions.

The largest mammal is the blue whale.

Blue whales live in the deep seas of the world's oceans and feed on small plankton, their mouths are very wide and can hold tons of food, and they need to consume 2-4 tons of food every day to maintain their strength and weight. Blue whales are a massive cetacean, the largest known mammal on Earth, they can reach up to 30 meters in length and weigh up to 173 tons, which is larger than a Boeing 747. The tongue of a blue whale can weigh up to tons, enough to fill a small car.

In addition to their huge size, blue whales also have a very unique feature, which is that they can emit extremely low-frequency sounds, which can travel thousands of kilometers and are used by other blue whales for long-distance communication and positioning. Although blue whales are very large and wide, they are very agile in the water and can stay underwater for up to 20 minutes.

The habits of the blue whale

Blue whales spend most of their time in the deep ocean, and they usually swim at depths of several hundred meters, with the deepest recorded reaching a depth of 3,800 meters. Blue whales are social animals that usually act together in groups, and they maintain group stability by hugging each other, rubbing their bodies, etc.

Every summer, adult female blue whales travel to the Antarctic or Arctic waters to breed, and male blue whales pair up with females at this time to find food together. While blue whales can stay underwater for long periods of time, they still need rest and sleep, they will surface to breathe air and have a short rest at this time.

Blue whale.

It is 181 meters long and weighs 181 metric tons.

The blue whale is not only the largest cetacean, but also the largest living animal, by far the largest mammal. The body of the blue whale is so huge that it has a tongue of 2,000 kilograms, a skull of 3,000 kilograms, a liver of 1,000 kilograms, a heart of 500 kilograms, and a blood circulation volume of 8,000 kilograms.

Blue whales are distributed worldwide, with the largest number in Antarctic waters, mainly in temperate and cold cold waters with water temperatures of 5-20, and a few whales have come to swim in the Yellow Sea and Taiwan waters.

Feeding mainly on plankton and krill, they breed in winter, and females generally give birth once every 2 years, with only 1 litter per litter. Blue whales are pale blue or rat-gray on the entire body, with pale fine markings on the back and white spots on the chest, and can be up to 33 meters long and weigh up to 181 tons.