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Sharks are the most fearsome predatory fish of the seas. There are 375 species of sharks. They live mostly in warm seas.
Their torpedo-shaped bodies make them very fast swimmers. Sharks have a skeleton made of rubbery cartilage. Most other kinds of fish have bony skeletons.
The world’s biggest fish is the whale shark. It can grow well to over 12 metres long. Unlike others sharks, the whale shark and the basking shark mostly eat plankton and are completely harmless.
Sharks main weapon are its teeth. They are powerful enough to bite through steel plate. The killing machine of the shark world is great white shark. This shark is responsible for most attacks on humans. Up to 20 people die from recorded shark attack each year. So, be careful when you swim in the sea.
Diah Lutfi Ani
IX A / 10 / 9297
Skin is an important organ of the human body. It covers the body and performs many special functions.
Skin is the largest organ in the human body. It weights between two and three kilograms and is either glabrous or hairy. Glabrous skin is that found on the palms of the hands and the souls of the feet.
It is smooth and hairless. Hair skin covers the rest of the body and this varies in texture, thickness, and amount of hair.
Skin is made up two layers. The outer layer is epidermis. This is mainly dead or dying skin cells. Beneath the epidermis is the dermis. The dermis is made from tougher fibres and is thicker than the epidermis. Within the dermis are nerves, blood vessels, and glands.
Skin does a number of important things for the body. It provides a protective covering for the body, helps to prevent the body from drying out, holds the body organs in place, and regulates the body temperature.
The skin, therefore, is a complex part of the human body.
(Paten UN SMP/MTs 2010, Bahasa Inggris Paket 4 hal.134-135)
Diah Lutfi Ani
IX A/10
