Crab Movement and Anatomy Concepts

The video explains why crabs walk sideways, focusing on their anatomy, evolution, and habitat. Crabs have legs attached to the sides of their bodies, bending outward, which facilitates sideways movement. Their large shells also make sideways walking easier. Crabs can live in various environments, including water and land, and their movement style helps them navigate different surfaces. The main reasons for their sideways movement are morphological adaptations and environmental factors.

How many legs does a crab have on each side of its body?

• 6

• 8

• 10

• 12

What is the primary function of the front pair of crab legs?

• Hunting and defense

• Swimming

• Jumping

• Digging

Why do crabs primarily walk sideways?

• Their shell is too small

• Their legs bend outward

• Their legs are attached at the back

• They have no other choice

What allows crabs to rotate their bodies despite walking sideways?

• Flexible joints

• Strong muscles

• Lightweight shell

• Long legs

In which environments are crabs commonly found?

• Deserts

• Forests

• Water and sand

• Mountains

How does sideways movement benefit crabs in their habitat?

• It helps them swim faster

• It makes them invisible to predators

• It allows them to climb trees

• It enables them to move on various surfaces