Bone is not a solid uniform material; it has spaces between the hard elements.
The hard outer layer of the bone is made up of the compact cortical bone tissue that gives bone the hard, white, smooth solid appearance. This is often called 'dense' bone.
The inside of the bone is filled with trabecular bone tissue (cancellous or spongy bone) which has a honeycombed appearance due to its open cell porous network made up of rod and plate elements that give the bone lightness and room for the blood vessels and bone marrow.
Bone marrow
The innermost layer is the bone marrow.
bone marrow
Bone Marrow
The earths innermost layer is the Inner Core.
The inner core is the innermost layer of the earth.
Bone
The inner core is the innermost physical layer of the Earth. The core is the innermost chemical layer.
there are 5 layers of atmosphere.i think trposphere is the innermost layer of the atmosphere
The endocardium is the innermost layer of the heart wall.
endometrium.this layer is shed as menstrual blood every month to be replaced
Mantle
Mantle