Which of the Following Chordates Have Cartilaginous Backbones

The vertebrae surround and protect a nerve cord and provide the animal with structural support. The upper 24 pre-sacral vertebrae are articulating and separated from each other by intervertebral discs and the lower nine are fused in adults five in the sacrum and four in the coccyx or tailbone.

Ch9l4a Chordates And Vertebrates Science Quizizz

Vertebrates have a vertebral column in which the notochord is replaced by multiple vertebrae that form a backbone.

. . The number of vertebrae in a region can vary but overall the number remains the same. In a human vertebral column there are normally 33 vertebrae.

Vertebrates Vertebrata are a group of chordates that includes birds mammals fishes lampreys amphibians and reptiles. Spell Check This is an executable example with additional code supplied To obtain just the plug-ins please click.

Chordates Biology I

Phylum Chordata Class Pisces

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