Most invertebrates/bone-lacking animals live underwater. So they do not need bones for support. Instead they just make rippling wave-like movements to move along with the current of the water.
Land-animals with no bones, such as insects, have an exoskeleton.
Snails do not have any bones in their body, so they have no joints. Their entire body lacks any sort of support structure, which is why they grow their shells.
The octopus completely lacks any bones in its body.
Earthworms
THE BRONCHIOLES
Plant cells
Cartilage is a connective tissue due to its composition of specialized cells (chondrocytes) embedded in an extracellular matrix of collagen and proteoglycans. It also provides structural support, flexibility, and cushioning between bones in joints. Additionally, it lacks blood vessels and nerves, characteristics common to connective tissues.
One vertebrate that lacks a bony spine is the shark. Many different types of shark have cartilage instead of bones.
An Edentate is an animal that lacks teeth. (This includes humans of course!!)
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A Mitochondrion
An Edentate is an animal that lacks teeth. (This includes humans of course!!)
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