Image of the pellicle of Opercularia coarctata. Indentations of the plasma membrane penetrate the alveolar membranes end as coated pits. These pits are also known as pellicular pores are homologous to...

Platinum replica depicting the cytoskeletal organization of dendritic spines in extracted 14 DIV neurons. Mushroom spines associate with dendrites at the base (bottom) and with axons by the head (top)...

A high resolution image of the pellicle of Opercularia coarctata. Indentations of the plasma membrane penetrate the alveolar membranes end as coated pits. These pits are also known as pellicular pores...

A high resolution view of the left side of the buccal cavity. It is covered by the plasma membrane, alveoli and a single partial layer of microtubules. Specialized cytoplasm lines the posterior end of...

TEM image of frozen hydrated soluble chromatin isolated from chicken erythrocyte nuclei and vitrified in low salt. Polynucleosomes adopt an irregular zigzag fiber conformation (a,b,k), and show a 'ste...

A view of the left side of the buccal cavity. It is covered by the plasma membrane, alveoli and a single partial layer of microtubules. Specialized cytoplasm lines the posterior end of this border. Or...

of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Scanning electron micrograph of the epidermal surface of the flatfish sole Parophrys detulus shows a labyrinth of surface ridges. Image from Fahrenbach,...

Figs. 314 from Don Fawcett's Chapter 12 (Centrioles). At the base of the flagellum of a mammalian spermatid, the juxtanuclear proximal centriole is continuous (at the arrow) with a structure of simila...

Electron micrograph showing fingerprint like ridges called microplicae on the surface of fish skin epidermis from the neon tetra. These ridges offer mechanical reinforcement against trauma and help ho...

One parasomal sac lies anterior to each basal body of the somatic ciliature. A parasomal sac is an indentation of the plasma membrane that penetrates into the cytosol past the alveolus. Most sacs end ...