Question

LEI AS INFORMAÇÕES SOBRE A ANATOMIA DOS TUBARÕES E COMENTE AS 3 MAIS INTERESSANTES, NO SEU PONTO DE VISTA.

Shark Anatomy
Sharks have a range of adaptations that make them perfectly suited to their environment. It's no wonder they've gained a reputation for being some of the most impressive and formidable predators on the planet!
SKELETON
Shark skeletons are made of cartilage. This is strong and durable, yet much more flexible and lighter than bone. Being lighter helps a shark to stay afloat and reduces the amount of energy they need to move about. The flexibility of cartilage also allows them to make tight turns quickly. Making them one of the most agile animals in the ocean.
Scientists can tell the age of a shark by counting the rings on their backbone!
SKIN
Shark skin is covered with millions of tiny teeth called dermal denticles. These point backwards, reducing surface drag and helping the shark swim faster. As a shark grows they shed their denticles, replacing them with larger ones.
TEETH
Made of enamel, shark teeth are strong and appear in huge numbers in the fossil record.
Sharks fend for themselves immediately after birth, so they're born fully equipped. They have many rows of teeth which are constantly being replaced. Ensuring they always have a full set of razor-sharp pearly-white gnashers.Sharks replace their teeth approximately every 2 weeks. Some species can lose 30,000 teeth in their lifetime!
FINS
Fins provide balance and stability in the water. Sharks have a large dorsal fin which provides balance. Usually they'll also have a smaller dorsal fin further back towards their tail. Their pectoral fins are used to steer and lift themselves in the water. And their tails are used to propel themselves forward.The size and shape of a shark’s fins and tail can vary greatly.
GILLS
To breathe many shark species have to remain in constant forward motion. As they swim water is driven through their mouth and out over their gills. A process known as ‘ram-ventilation’. As water passes over the gills, oxygen is absorbed into tiny blood vessels and transported around the body.
SINK OR SWIM
To help keep them buoyant sharks rely on:
a light skeleton
the lift effect produced by their fins as they move through the water
large livers that store low-density oils


me ajudem pfvor é urgente ​

Answer 1

3 more interesting points-
-The skeleton of the shark
-The facts of the skin
-The facts of the teeth