Stages of coated pit vesicle invagination during micropinocytosis. Each frame is a portion of the surface of polychromatophilic erythroblasts from guinea pig bone marrow and various stages of vesicle...

Scanning electron micrograph showing the tip of a Hydra viridis tentacle. A meshwork of triggered nematocyst cells is visible. When hooked cnidocytes on the surface of the tentacle come in contact wit...

Scanning electron micrograph showing tentacles on the head of a Hydra viridis. Epithelial cells located at the base of the tentacle are in a flat, contracted state. Cell distal to the head of the H. v...

Scanning electron micrograph showing tentacles on the head of a Hydra viridis. Epithelial cells located at the base of the tentacle are in a flat, contracted state. Cell distal to the head of the H. v...

Transmission EM showing adherens junctions between cells of the enveloping layer of a 24 hr (prim-5) Zebrafish embryo. Specimens fixed in Karnofsky's (overnight at 4˚C) followed by postfixing in 4% ...

Collagen fibrils in the basal plate of Fundulus heteroclitus scales. The basal plate is made of thick collagen fibrils about 100 nm in diameter, which are organized into a plywood-like structure. Note...

Transmission EM showing tight junctions apically and adherens junctions laterally between cells of the enveloping layer of a 24 hr (prim-5) Zebrafish embryo. Specimens fixed in Karnofsky's (overnight...

Collagen fibrils and mineralization in the external layer of Fundulus heteroclitus scale. The external layer is the second of three layers closest to the dermis of an elasmoid. It is composed of thin ...

Single computed slice through a tomographic reconstruction of a selectively-stained spiny dendrite. This medium spiny neuron was contained in a thick section from the neostriatum of a dopamine transp...

Cell junctions formed between adjacent epidermal cells in Fundulus heteroclitus scales. Desmosomes line the membranes of two epidermal cells. A vast network of intermediate filaments and microfilament...