Vertebrates are animals with backbones and bones inside their bodies. The bones help to support their bodies.

椎动物是身体里边有椎和骨头动物。这些骨头来帮助支撑他们身体。

The individual units resemble vertebrae in the human spine.

每个单独单位类似于人类椎椎骨。

Babies' spines just have one curve like a " c."

婴儿椎只有一个弧度，就C一样。

Joints, muscles and ligaments that are attached to the bones hold it all together.

附着于椎骨关节、肌肉和韧带，把它包覆在一起。

And I'm reviewing my knowledge of invertebrate zoology.

我还在回想有关无椎动物学知识。

And he says that the octopus has a nervous system that is comparable to vertebrates.

他还说章鱼拥有能够跟椎动物相当神经系统。

The spine is sort of this natural S shape, a very like subtle S-shaped curve.

椎是一种自然 S ，非常微妙 S 线。

In fact Ricky wants to work with other people that have injuries to their backbones.

事实上，瑞奇想帮助其他椎受伤人。

The first animals to develop a backbone were fishes.

第一种进化出椎动物是鱼类。

So the five inches of spine that is bruised. - Right in here.

这五英寸椎有淤青。- 就在这里。

Your head, your spine, everything else wants to keep going in a straight line.

而你头，你椎，所有东西则都要想要继续走直线。

Cephalopods may have evolved complex brains long before our vertebrate relatives.

头足类或许比我们椎动物近亲更早演化出复杂脑部。

So, severing their abductor muscle is almost like, severing you spine. Yikes!

所以，切断他们展肌就切断你椎一样。呀，好可怕！

A worm doing the backstroke might be the reason your spine runs down your back.

那只做仰泳蠕虫可能就是为什么你椎沿着背部往下原因。

My spine was chipped in eight places. Four ribs were broken.

我椎有八处碎裂。断了四根肋骨。

Which of these sea creatures is the largest invertebrate on Earth?

以下哪种海洋生物是地球上最大无椎动物？

It's the world's largest invertebrate, which is an animal with no backbone.

它是世界上最大无椎动物，也就是没有椎动物。

Invertebrates like snapping shrimp, fish and marine mammals all use sound.

诸如虾之类无椎动物、 鱼类，以及海洋哺乳动物都使用声音。

But Bajadasaurus spine's made of the same keratin material as our horned animals of today.

但是巴雅达龙椎和我们今天角化动物是由同样角蛋白材料制成。

It's the longest stretch of your spinal column that is shown.

它是椎最长部分。