Sumatran tiger

The Sumatran tiger is the smallest of all still existing tiger subspecies. Male Sumatran tigers average 234 cm (7 feet, 8 inches) in length from head to tail and weigh about 136 kg (300 pounds). Females average 198 cm (6 feet, 6 inches) in length and weigh about 91 kg (200 pounds). Its stripes are narrower than other subspecies of tigers' stripes, and it has a more bearded and maned appearance, especially the males. Its small size makes it easier to move through dense rain forests. It has webbing between its toes that, when spread, makes Sumatran tigers very fast swimmers. It has been known to drive hoofed prey into the water, especially if the prey animal is a slow swimmer

Tiger hunting

Humans are the tiger's most significant predator, as tigers are often poached illegally for their fur. The Bengal Tiger is the most common subspecies of tiger, constituting approximately 80% of the entire tiger population, and is found in Bangladesh, Bhutan, Myanmar, Nepal, and India and has been hunted in those countries for centuries. Tiger has historically been a popular big game animal and has been hunted for prestige as well as for taking trophies. Poaching continues extensively even after such hunting became illegal and legal protection was provided to the Tiger. Now an endangered species, the majority of the world's tigers now live in captivity. Tigers were once considered to be harder to hunt than lions, due to their habit of living alone in dense cover and not noisily asserting their presence with roars as often

Forest Horse

Originally from Northern Europe, the Forest Horse, or Dulivial, was a large-boned, slow-moving, heavy horse believed to be the ancestor of the draft breeds of Europe. Although now extinct, the Forest Horse was well adapted to its environment, developing broad hooves, which enabled it to live in the widespread swampy areas, and also a thick and wiry coat which may have been dappled to provide the horse with camouflage.

Stratovolcanoes

Stratovolcanoes have vertical sides with cones that stick out like enormous bumps. They are built up when eruptions of thick lava, tephra, and pyroclastic flows happen. It takes thousands of years for the pressure to construct up enough in stratovolcanoes to cause an eruption. More than one type of magma builds up in stratovolcanoes. They are basalt, andesite, dacite, and rhyolite magma. All of those magmas cause volatile eruptions apart from basalt magma. There are a group of different vents around stratovolcanoes. Some of the vents are cinder cones and domes low on the sides of the volcano. Sometimes stratovolcanoes are called composite cones.

Shield Volcano

Shield volcanoes are huge in size. They are built by many layers of liquid lava flows. Lava spills out of a central vent or collection of vents. A broad shaped, quietly sloping cone is formed. This is caused by the very liquid, basaltic lava which can't be piled up into steep mounds.

Shield volcanoes may be produced by hot spots which put down far away from the edges of tectonic plates. Shields also occur along the mid-oceanic ridge, where sea-floor spreading is in progress and the length of subduction related volcanic arcs.

The eruptions of shield volcanoes are characterized by low-explosivity lava-fountaining that forms cinder cones and spatter cones at the vent. Famous shield volcanoes can be establish for example in Hawaii (e.g. Mauna Loa and Kilauea).

Polygenetic volcanic field

A polygenetic volcanic field is a volcanic field of sprinkled volcanic vents. These volcanic fields, containing many polygenetic volcanoes, are renowned for having more than one eruptive event from the identical vent(s), quite than the more ordinary monogenetic volcanic field. Polygenetic volcanic fields usually occur where there is a sophisticated magma chamber. These volcanic fields may demonstrate lithological discontinuities due to main changes in magma chemistry, volcanotectonic events, or extended erosional intervals, and may last >10 million year period.

Unlike monogenetic volcanic fields, volcanoes in polygenetic fields arrive at huge sizes, such as Mauna Loa, which is the world's main active volcano.

Some types of volcanoes comprise shield volcanoes, stratovolcanoes, complex volcanoes, somma volcanoes and calderas.

Mammalian lungs

The lungs of mammals have a spongy texture and are honeycombed with epithelium having a much larger surface area in total than the outer surface area of the lung itself. The lungs of humans are typical of this type of lung.

Breathing is largely driven by the muscular diaphragm at the bottom of the thorax. Contraction of the diaphragm pulls the bottom of the cavity in which the lung is enclosed downward. Air enters through the oral and nasal cavities; it flows through the larynx and into the trachea, which branches out into the main bronchi and then subsequent divisions. During exercise, the diaphragm contracts, forcing the air out more quickly and forcefully. The rib cage itself is also able to expand and contract to some degree, through the action of other respiratory and accessory respiratory muscles. As a result, air is sucked into or expelled out of the lungs, always moving down its pressure gradient. This type of lung is known as a bellows lung as it resembles a blacksmith's bellows.[3]