What is the difference between humans and sharks?

Humans and sharks are both vertebrate animals, but they have many differences. Some of the key differences include:

* Body structure: Humans are bipedal, meaning they walk upright on two legs. Sharks are fish and have a streamlined body with fins that allow them to swim efficiently through the water.

* Skin: Human skin is smooth and hairless, while shark skin is covered in dermal denticles, which are small, tooth-like scales.

* Teeth: Humans have four types of teeth: incisors, canines, premolars, and molars. Sharks have multiple rows of sharp, serrated teeth that they use to catch and tear their prey.

* Diet: Humans are omnivores, meaning they eat both plants and animals. Sharks are carnivores and feed primarily on fish, seals, sea lions, and other marine animals.

* Habitat: Humans live on land, while sharks live in the ocean.

* Reproduction: Humans reproduce sexually, giving birth to live offspring. Sharks reproduce sexually or asexually, and some species give birth to live offspring while others lay eggs.

* Lifespan: Humans have a relatively long lifespan, with an average life expectancy of around 72 years. Sharks can live for much longer, with some species living for over 100 years.