They all have a dense, smooth-looking external layer of compact, or cortical bone around a porous, honeycomb-looking area of spongy bone.

它们都有致密、光滑的外层致密或皮质骨，围绕着多孔、蜂窝状的海绵骨区域。

Bones have two types of bone tissue; compact bone and spongy bone.

骨头有两种类型的骨组织；致密骨和海绵状骨。

Compact bone is dense and heavy, since it needs to be strong as it's the outside layer of the bone.

致密骨致密且沉重， 因为它位于骨骼的外层， 因此需要坚固。

We also talked about the three cartilage types, spongy and compact bone connective tissue, and how and why our blood is also a connective tissue type.

我们还谈到了三种软骨类型，海绵状和致密骨结缔组织，以及我们的血液如何以及为什么也是结缔组织类型。

Compact bone tissue on the other hand is quite dense, with no visible spaces. It forms the external layer of your bones and stores calcium for bone cells to use to make more tissue.

骨质致密，没有可见的空隙，形成骨骼的外层，储存钙，供骨细胞用来制造更多的组织。

But at least today we learned about the anatomy of the skeletal system, including the flat, short, and irregular bones, and their individual arrangements of compact and spongy bone.

但至少今天我们了解了骨骼系统的解剖学，包括扁平、短和不规则的骨骼，以及它们紧凑和海绵状骨骼的个体排列。

Flat bones are generally thin and composed of two more or less parallel plates of compact bone enclosing a layer of spongy bone.

扁骨通常是菲薄的，由两层近似平行的密质骨骨板包绕一层松质骨组成。

Irregular bones have complex shapes. They also vary in the amount of spongy and compact bone present. Such bones include the vertebrae and certain facial bones.

不规则骨形状复杂。它们松质骨和密质骨的含量也各不相同。这种骨骼包括椎骨和某些面颅骨。

Their texture is spongy except at the surface, where there is a thin layer of compact bone. Examples of short bones are the wrist and ankle bones.

它们的结构除表面为一层菲薄的密质骨外，其余部分如海绵般疏松多孔。短骨的实例包括腕骨和踝骨。