An anatomical diagram of the male pelvic floor showing the bladder, intestine, and pubococcygeus muscle with contraction arrows.

An anatomical diagram of the male pelvic floor showing the bladder, intestine, and pubococcygeus muscle with contraction arrows.

Simple anatomical diagrams showing the PC muscle and its relation to the pelvic floor, with arrows indicating the direction of contraction Voir plus

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A detailed botanical watercolor illustration of a plant cell featuring a large central vacuole, a nucleus, chloroplasts, and other organelles within a rigid cell wall.

A diagram of a plant cell showing organelles including the cell wall, cell membrane, nucleus, mitochondrion, chloroplast, and vacuole, labeled with text.

A detailed, flat, top-down illustration of an animal cell with labeled organelles including the nucleus, mitochondria, Golgi apparatus, and endoplasmic reticulum, rendered in colored inks on a pale blue background.

A vintage hand-colored copperplate engraving of a human heart, featuring detailed anatomical hatching and labeled with various letters.

A scanning electron micrograph showing the microscopic surface of a leaf with several open stomata surrounded by guard cells, rendered in shades of magenta and purple.

A detailed copperplate engraving of a human skeleton standing in a frontal position against a dense, cross-hatched black background.

A watercolor painting of a human ear rendered in shades of rose and peach, featuring deep red shadows in the ear canal and a textured, granulating effect on the earlobe.

A watercolor painting of a human ribcage viewed from the front, featuring ivory and ochre bone tones with blue-grey cartilage against a textured paper background.

A wide-field view of the Sun's corona featuring flowing, pearl-white streamers extending into the dark expanse of space, with a bright star visible in the distance.

A cross-section illustration of an underground ant colony with tunnels connecting various chambers containing ants, larvae, and eggs, set beneath a grassy mound.

A line art drawing of a faceless human figure in a crouching pose on a white background.

A detailed anatomical illustration of a human heart showing the four chambers, the aorta, and major blood vessels against a white background.

A detailed medical illustration of a human knee joint showing the femur, tibia, fibula, and associated ligaments and menisci against a white background.

A detailed, hand-colored anatomical engraving showing a cross-section of the heart valves, with the cusps resembling pale flower petals surrounded by muscular tissue.

A full-body anatomical écorché figure standing in a neutral pose, rendered in the style of a vintage copperplate engraving with detailed muscle hatching and pale tendons against a plain, off-white background.

A detailed botanical illustration of a pink lily flower cross-section, with labels pointing to the stigma, style, anther, filament, petal, sepal, and ovary.

A watercolor anatomical illustration of a human arm showing the musculature of the shoulder, upper arm, and forearm.

A stylized, high-contrast risograph print in fluorescent pink and teal depicting a biological cell undergoing anaphase, with two sets of chromosomes being pulled apart by spindle fibers.

An anatomical cross-section illustration of a human eye showing the cornea, iris, lens, retina, and optic nerve on a textured, off-white background.

A detailed, hand-colored engraving of the three ossicles of the human ear—the malleus, incus, and stapes—depicted in an ivory and pale gold tone against a plain background.

A watercolor illustration of the human circulatory system showing a faint grey outline of a standing figure with detailed red arteries and blue veins branching from the heart.

A full-body anatomical illustration of a human skeleton rendered in a watercolor style on a pale cream background.

A detailed ink drawing of a human brain, focusing on the intricate folds and grooves of the cerebral cortex.

A cross-section diagram of soil layers showing grass on top, followed by layers labeled Humus, Topsoil, Subsoil, and Bedrock.

A single Purkinje neuron with an extensive, tree-like dendritic arbor extending from a central cell body, captured in a Golgi stain against a warm amber background.

A detailed scientific illustration of a single neuron with a central soma, complex branching dendrites, and a long axon, rendered in black ink on aged parchment paper.

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A close-up view of a dark-skinned man's palm with visible skin texture and creases, with his face and round glasses blurred in the background under soft studio lighting.

A detailed medical illustration of a human heart in cross-section, showing the four chambers, valves, and major blood vessels against a white background.

A flat vector illustration of the human heart showing its four chambers and major vessels, colored in vibrant red and blue against a white background.

A detailed anatomical cross-section illustration of the human eye, labeling structures including the cornea, iris, lens, ciliary body, sclera, choroid, retina, vitreous humor, and optic nerve.

A detailed charcoal-style drawing of a human pelvis viewed from the front, rendered in shades of grey on a textured, paper-like background.

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A digital illustration of a DNA double helix unwinding to reveal the internal base pairs and sugar-phosphate backbones against a white background.

A drawing of a human hand on blue-grey paper, featuring a faint grey outline of the palm and fingers with delicate gold lines representing the nervous system branching from the wrist to the fingertips.

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A transparent glass head model displays a detailed, glowing network of red and blue blood vessels within the brain against a plain white background.

A cross-section view of a germinating bean seed in dark soil, showing a pale root system growing downward and a curled green shoot reaching upward toward a sliver of light, with an earthworm visible in the soil.

An educational illustration on a cream background shows a red circle unrolling into a straight horizontal ribbon along a number line to demonstrate the relationship between diameter and circumference, with the formula C = πd displayed.

A detailed, hand-colored anatomical engraving of a human tongue viewed from above, showing the texture of the papillae and the V-shaped arrangement of the circumvallate papillae.

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An anatomical etching of a human hand skeleton, rendered in sepia ink on ivory paper with cross-hatching and highlights, shown flat and spread out.

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A detailed anatomical cross-section illustration of human skin showing the epidermis, dermis, and subcutis layers, including a hair follicle, sweat glands, and blood vessels.

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A detailed, hand-colored copperplate engraving of a human sacrum viewed from the front, featuring fine hatching and ivory and ochre tones on a textured paper background.

A detailed, hand-colored copperplate engraving illustration of human kidney arteries, showing a dense, branching network of crimson vessels within a bean-shaped organ outline.

A detailed ink illustration of the human spine and pelvis viewed from behind, rendered with fine hatching on a textured, aged paper background.

A detailed stipple engraving of a human brain viewed from above, rendered in sepia tones on a textured paper background.

A high-magnification fundus photograph of a human retina, showing the optic disc, macula, and branching retinal blood vessels against a golden-amber background.

A detailed 3D medical illustration of an Influenza A virus cross-section, displaying the viral envelope, surface spikes, and internal RNA segments against a white background.

An anatomical illustration of the human arm showing the network of arteries in red and veins in blue, rendered in ink and watercolor with a faint pencil outline.

A detailed stipple engraving in sepia ink showing a cross-section of a human molar, revealing the enamel, dentine, and pulp chamber extending into the roots.

A gouache painting depicting numerous red blood cells as rounded, dimpled crimson discs floating in a pale rose-colored fluid.

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A high-magnification scanning electron microscope image of a textured, spherical pollen grain against a black background, featuring selective false-color highlights in pink, orange, and blue.

A cross-section diagram showing an oceanic plate subducting beneath a continental plate, with magma rising to form a volcanic arc.

A high-resolution close-up view of a sunspot group on the solar surface, featuring dark umbrae, a fibrous penumbra, and bright flaring kernels surrounded by golden solar granulation.

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