x
uploads/spicule.jpg

spicule n.1.針狀體;【植物;植物學】交合刺;穗狀花序。2.【...

spiculum

Sponges have an irregular , asymmetrical body architecture ; there are two cell layers separated by a gelatinous mesenchyme containing amoeboid cells and skeletal spicules and fibers 海綿動物有不規則、不對稱的體制;二層細胞是由中間的凝膠狀的間葉細胞分開,內含有變形細胞(阿米巴細胞) 、骨針和纖維。

Osteoblasts can be seen lining the lacunae in the newly developing fetal bone , and they deposit bone along calcified cartilagenous spicules 在新生骨的骨陷窩周可見成骨細胞排列,這些細胞在鈣化的軟骨化骨周圍沉積成骨。

There is reactive new bone with pale pink osteoid being laid down next to a bony spicule at the upper left 并有反應性的新骨生成,在靠近左上部骨板處呈現淡紅色類骨質。

Tetraxon tetraxial spicule 四軸骨針

The bony spicules are even , with occasional lacunae containing osteocytes 骨板連續均一,偶爾可見包含骨細胞的腔隙。

Early cambrian sponge spicule fossils from zhenba county , southern shaanxi province 陜西鎮巴早寒武世海綿骨針化石

Cellular marrow is seen between the spicules of bone 可見蜂窩狀骨髓位于骨板之間。