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Cardiac stress test, artwork

Placing of electrodes for ECG, artwork

Placing of electrodes for ECG, artwork

Electrical conduction of the heart

ECG, conceptual artwork

ECG, artwork

ECG, computer artwork

ECG, computer artwork

ECG, computer artwork

Human arterial supply and venous drainage of the organs.

The analysis of sound frequencies by the basilar membrane.

Diagram of a mammalian muscle spindle.

心電図

心電図

The two sensory organs of balance: the cristae of the semicircular ducts and the maculae of the utricle and saccule.

Cross section of a V-type engine.

Diesel engine equipped with a precombustion chamber.

Height of space from Earth, illustration

The Hardy-Weinberg Law applied to two alleles.

Diagram of an artificial pacemaker

Female reproductive system, artwork

Muscle structure, artwork

Gate control theory of pain, artwork

Gender characteristics, artwork

Rising air in an unstable atmosphere

Electron shell

Four main types of estuaries: A) salt wedge estuary, B) partially mixed estuary, C) vertically homogeneous estuary, D) fjord.

Vegetation profile of a boreal forest. The tree layer consists mainly of conifers, and mosses are the predominant ground cover.

Cross section of a typical bomb calorimeter.

The process of cell division by mitosis.

Receptor-mediated endocytosis enables cells to ingest molecules such as protein that are necessary for normal cell functioning.

The endoplasmic reticulum plays an important role in the biosynthesis, processing, and transport of proteins and lipids.

Average exchange of energy between the surface, atmosphere, and space, as percentages of incident solar radiation.

The stages in the evolution of a wave (frontal) cyclone.

Diagram of a wave system depicting typical divergence and convergence distributions for non-tilting and tilting systems.

General patterns of atmospheric circulation over an idealized Earth with a uniform surface and the actual Earth.

Horizontal divergence and convergence patterns associated with the polar-front jet.

The onset and retreat of the West African monsoon with respect to the timing of the direct rays of the sun.

The weather model of meteorologist Edward Lorenz.

Diagram of a two-cavity klystron, used as an amplifier and RF signal source at microwave frequencies, and also as an oscillator.

Elements of a magnetron, used to generate power for radar systems, microwave ovens, plasma screens, and linear accelerators.

Elements of the traveling-wave tube (TWT), used to amplify microwave signals over broad bandwidths.

Electromagnetic spectrum. The visible range (shaded portion) is shown enlarged on the right.

The Michelson interferometer measures the effect on the speed of light of the motion of the ether through which light travels.

Blower-scavenged, two-stroke-cycle engine with uniflow scavenging, displaying both upstroke and downstroke.

Basic components of an electrochemical cell.

A tokamak is a toroidal magnetic confinement system used as a method of achieving fusion energy.

Georges Leclanche's dry cell and its later variations, zinc chloride and alkaline cells, are batteries commonly used worldwide.

Modern version of the Leclanche cell. This heavy-duty zinc-carbon primary battery is a dry cell with an immobilized electrolyte.

Automotive-type lead-acid battery, a storage battery that holds its charge for a long time and can be recharged.

Seismic ray types in Earth's interior from earthquake at F.

Three types of natural selection, showing the effects of each on the distribution of phenotypes within a population.

Evolutionary history of the globin genes. The dots indicate the duplication of ancestral genes, giving rise to new gene lineage.

The steps involved in the engineering of a recombinant DNA molecule.

Light waves matching the orientation of the molecules of a polarizing filter are absorbed, reducing the intensity of the light.

Uniformly accelerated motion; s = speed, a = acceleration, t = time, and v = velocity.

In Ptolemy's geocentric model of the universe, the Sun, Moon, and each planet orbit a stationary Earth.

The components of a scanning electron microscope (SEM).

The components of a transmission electron microscope (TEM).

The artery wall and the ultrastructure of the smooth muscle cells within it.

The diffusion of water across a semipermeable membrane.

The diffusion of potassium cations across a semipermeable membrane.

Changes in ion permeance underlying the action potential.

Theoretical depiction of the movement of tectonic plates across Earth's surface.

Diagram depicting the process of atoll formation. Atolls are formed from the remnant parts of sinking volcanic islands.

Two types of pressure gauge: the U-tube manometer and the Bourdon-tube gauge.

Approaching the speed of light, an object appears shorter, with a longer time interval, relative to its intervals when at rest.

The 4-D space-time continuum is distorted in the vicinity of any mass, depending on the mass and the distance from the mass.

Differentiation of the external genitalia in the human embryo and fetus.

Fission bomb designs

Thermonuclear warhead

Height of space from Earth, illustration

Height of space from Earth, illustration

Laser eye surgery, artwork

Laser eye surgery, artwork

A ecg that show heart beat with a black and silver background

An ecg display to show heart beat or computer related information

Bazett QT correction formula, illustration

Heart rate and QT interval, illustration

Heart rate and QT interval relationship, illustration

Bazett QT correction formula, illustration

Normal ECG wave in lead V1, illustration

Normal ECG wave in lead II, illustration

Normal ECG wave in lead V6, illustration

Normal ECG wave in aVR lead, illustration

Normal ECG wave in lead V4, illustration

A fuel cell (actually a group of cells) has essentially the same kinds of components as a battery.

A grid-connected solar cell system.

Phylogeny based on differences in the protein sequence of cytochrome c in organisms ranging from Neurospora mold to humans.

Diagram showing a healthy heart valve compared with a diseased heart valve and an artificial heart valve.

Bohr atomic model

Polar covalent bond

Annual circulation patterns in a dimictic lake: stratification in the summer and complete overturn in the autumn and spring.

Vegetation profile of a temperate deciduous forest.

Vegetation profile of a desert.

Vegetation profile of tropical mountain lands.

Stages in the process of meiosis, cell division among sexually reproducing organisms.

Transverse section of an artery.

The journey of the Galileo spacecraft to Jupiter, highlighting major observations along the trajectory, as well as their dates.

Basic characteristics of orbits in which a satellite can be placed around Earth, categorized by inclination, shape and altitude.

Diagram of a human uterus during the fourth month of pregnancy.

Normal Heartbeat, illustration

Normal Heartbeat, illustration

Normal Heartbeat, illustration

Situs inversus, artwork

Male anatomy, artwork

Male anatomy, artwork

Male urinary system, artwork

Pacemaker, illustration

Pacemaker, illustration

Pacemaker, illustration

Pacemaker, illustration

Pacemaker, illustration

Pacemaker, illustration

Pacemaker, illustration

Pacemaker, illustration

Pacemaker, illustration

Pacemaker, illustration

Pacemaker, illustration

A green ecg monitor with heart beat information

Sinus tachycardia, illustration

Coriolis force

The gasoline carburetor is a device that introduces fuel into the airstream as it flows into the engine.

The sequence of events in a four-stroke diesel engine involves a single intake valve, fuel-injection nozzle, and exhaust valve.

Cutaway view of a typical construction of a miniature power cell, as in a zinc-silver oxide or zinc-mercuric oxide system.

Types of faulting in tectonic earthquakes.

Displacements in the Earth in four types of free vibrations.

Earth's prebiotic and modern atmosphere

Pay-off matrix showing bourgeois, or mixed attack/retreat behaviour, as the most stable strategy for a population.

Comparison of a normal heart to one with a ventricular septal defect

Diagram demonstrating the difference between a normal heart and a heart with an atrial septal defect

The surface reflectance differences between a pre-agricultural (forest) and a modern agricultural (patchwork heating) landscape.

An electron (e) in a solar cell interacting with light and dissipating excess energy is analogous to a child playing on a slide.

Typical gasoline engine cooling system.

Four types of gasoline engines: opposed-piston engine, rotary engine, in-line engine, and V-type engine.

U.S. space station Skylab (occupied 1973-74), shown with docked Apollo Command and Service modules.

Schematic drawing of the structure of a typical bacterial cell of the bacillus type.

A heart-lung machine diverts blood from the body to an oxygenator, which removes CO2, adds O2, and returns the blood to the body

Protein synthesis, artwork

Pleural effusion treatment, artwork

heart

Height of space from Earth, illustration

Healthy female figure, artwork

Healthy female figure, artwork

Female reproductive system, artwork

Pelvic inflammatory disease, artwork

Male Down's syndrome karyotype, artwork

Correct computer use position, artwork

Spina bifida, artwork

Human stomach, artwork

Human olfactory region, artwork

Human olfactory region, artwork

Human olfactory system, artwork

Liver and pancreas, artwork

Dupuytren's contracture,artwork

Kidney stone, artwork

Tear production, artwork

Brain and spinal cord, artwork

Cervical conization, artwork

Female urinary system, artwork

Shoulder muscles, artwork

Heart, artwork

Eye anatomy,artwork

Kidney anatomy, artwork

Narrowed blood vessel, artwork

Narrowed blood vessel, artwork

Narrowed blood vessel, artwork

Anatomical terms, artwork

Anatomical planes of the body, artwork

Breast anatomy, artwork

Cardiovascular system, artwork

Collateral circulation, artwork

Heart, artwork

Narrowed coronary artery, artwork

Shoulder bones, artwork

Vascular disease progression, artwork

Cardiovascular system, artwork

Electrocardiograph, illustration

Electrocardiograph, illustration

高齢者男性の関節痛・息切れ・服薬

Seasons change because more direct sunlight falls on some parts of Earth than others at different times of the year.

Compton effect

Zonation of the ocean. Note that in the littoral zone the water is at the high-tide mark.

Vegetation profile of a grassland.

ECG and brain outline

Respiratory sinus arrhythmia, illustration

Cross section of a crystal microphone.

Pluto and the Kuiper belt

Space station Mir, after its completion in 1996, with the launch dates of each modular component shown.

Viral transfer of bacterial DNA, artwork

Annual temperature and precipitation patterns for several locations with different climatic conditions.

Gyrotron, electrons from the cathode acquire cyclotron rotation in the cavity.

The four strokes of a four-stroke cycle engine - intake, compression, power, and exhaust. Only the intake stroke delivers power.

Nickel (hydroxide)-cadmium cell of “jelly roll” construction. This rechargable battery is commonly used in portable devices.

Cutaway view of an alkaline-manganese dioxide power cell.

An internal-combustion engine goes through four strokes: intake, compression, combustion (power), and exhaust.

Typical gasoline engine lubrication system.

Generated by an undersea earthquake, a tsunami may propagate over open ocean waters before cresting and inundating a coastline.

Acne, artwork

Asthma inhaler use, artwork