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Science Source

medical illustration of A 3D molecular model of a human immunodeficiency virus (HIV) particle. HIV infects cells in the immune system, causing the body to become progressively more susceptible to infections and diseases. The conical viral capsid (red) is surrounded by a matrix composed of viral proteins (blue). These structures are enclosed within a viral envelope (purple) embedded with glycoproteins (yellow), which help the virus attach and fuse with target cells.
medical illustration of A conceptual illustration of the Zika virus, a mosquito-borne flavivirus closely related to the dengue virus. Transmission primarily occurs via bites from the Aedes aegypti mosquito.Patients may experience symptoms such as fever, rashes, joint pains, and conjunctivitis. However, infants have been reported to suffer from congenital microcephaly if their mothers were infected with the virus while pregnant.
medical illustration of CRISPR protein. CRISPRs (clustered regularly interspaced short palindromic repeats) are segments of repeating prokaryotic DNA involved in the prokaryotic immune system, and have been utilized in scientific research for gene editing. Cas proteins are delivered into a cell, whereby the organism's genome can be cut at specific locations in order to add, disrupt or change a sequence of genes.
medical illustration of Different types of virus shapes. Complex, Polyhedral, Helical and Enveloped. Illustration.
medical illustration of Illustration of types of blood cells showing a red blood cell (erythrocyte), white blood cells or leukocytes (basophil, lymphocyte, eosinophil, neutrophil, monocyte), and platelets.
medical illustration of Illustration of the immune system battling a cancer cell. T lymphocyte cells (orange) surrounding a cancer cell. T lymphocytes are a type of white blood cell that recognize a specific site (antigen) on the surface of cancer cells or pathogens and bind to it.
medical illustration of An illustration of the temporomandibular joint, where the head of the mandible articulates with the mandibular fossa of the skull. As the mouth opens, the head of the mandible glides forward onto the articular tubercle.
medical illustration of A diagram of illustrated sections of skin with different burn degrees. First degree burns (top) only affect the epidermis, the superficial layer of skin, and are commonly caused by sunburns. Second degree burns extend to deep portions of the dermis and are accompanied by the formation of blisters. Third and fourth degree burns extend beyond the epidermis and dermis to underlying layers of fat, muscle or bone, and require excision or amputation of affected regions.
medical illustration of A molecular model of immunoglobulin M (IgM), an antibody which responds to antigens during the initial exposure of an infection.
medical illustration of A conceptual illustration of microcephaly, a neurodevelopmental disorder associated with abnormal growth of the brain due to reduced head size. Microcephaly may be congenital or it may develop a few years after birth. Newborns affected by microcephaly may exhibit neurological defects, seizures, and impaired intellectual development. There's circumstantial evidence pointing to the Zika virus as a cause of a large number of cases of microcephaly in Brazil that is currently being investigated.
medical illustration of Illustration of a clogged artery. Plaque accumulated on the inner walls of an artery.
medical illustration of Illustration comparing the bronchioles of the lungs in a healthy person and a person with asthma. Bronchioles are airways in the lungs, smaller branches of the bronchi. In asthma, they become inflamed and clogged with mucus, resulting in airflow obstruction and shortness of breath.
medical illustration of A 3D model of a human skeleton and brain.
medical illustration of An illustration of joints affected by psoriatic arthritis, a chronic inflammatory skin condition (psoriasis) accompanied by arthritis and other joint problems. A
medical illustration of Illustration showing a pair of Tyrannosaurus rex in a forest. Tyrannosaurus was one of the largest known land predators, measuring up to 13 metres (43 ft) in length, up to 4 meters (13 ft) tall at the hips, and up to 6.8 metric tons (7.5 short tons) in weight. It lived throughout what is now western North America. Fossils of T. rex date to the last three million years of the Cretaceous Period, approximately 68 to 65 million years ago.
medical illustration of Illustration of an open and closed normal aortic valve (above) compared to an open and closed aortic valve stenosis (below).
medical illustration of Illustration showing the progression of cervical cancer. Symptoms of cervical cancer include bleeding between periods, pain after sexual intercourse and heavier periods. Cancer of the cervix is rare and if detected early is almost always cured.
medical illustration of A molecular model of immunoglobulin G2 (IgG2), a monoclonal antibody secreted by plasma B cells in the immune system.
medical illustration of An illustrated diagram of the Ebola virus (EBOV), a virus responsible for severe hemorrhagic fever in humans and mammals, which can be transmitted through body fluids or natural reservoirs such as bats.
medical illustration of Illustration depicting hepatocellular carcinoma, or liver cancer. This is the most common type of liver cancer. It is often secondary to either a viral hepatitis infection (hepatitis B or C) or cirrhosis, with alcoholism being the most common cause of the latter
medical illustration of Illustration of a chromosome with telomere. Chromosomes are composed of deoxyribonucleic acid (DNA) (gold ribbon inside chromosome) that contain sections, called genes, which encode the body's genetic information. Telomeres (red area) protect the ends of the chromosome and play a key role in cell aging. As cells replicate and age the telomere steadily shrinks. When the telomere reaches a certain length the cell stops dividing and dies.
medical illustration of Illustration depicting a man with atherosclerosis, the limitation of blood flow through the artery due to plaque blockage (inset right). For comparison a normal artery is also shown in the inset (left).
medical illustration of Sequence illustrating the steps of angioplasty with stenting in an artery suffering from Atherosclerosis. A deflated balloon guides the stent into the narrowed artery. The balloon is inflated, crushing the plaque into the walls of the artery and expanding the stent. The balloon is deflated and removed leaving the stent in place holding the passageway open for easy blood flow.
medical illustration of Illustration of a coronary bypass. When the coronary artery is obstructed by a plaque of atheroma (the yellow area of the vessel in inset), the blood can not circulate correctly to irrigate the heart. A bypass is undertaken with a transplantation of a vessel (part of an artery or vein) from the aorta to the affected coronary artery, so as to deviate the coronary circulation.
medical illustration of Stages of ovulation 1. Egg develops, 2. Egg is released from ovary 3. Endometrium develops, 4. Endometrium and egg shed.
medical illustration of An illustrated section of tissue, depicting the layers and structures in human skin. The skin is divided into two major layers called the epidermis and dermis. The epidermis provides the protective outer surface of the skin, and consists of stratified squamous epithelium. The dermis lies beneath the epidermis, and consists of connective tissue which contains nerve endings, hair follicles, sweat glands and blood vessels.
medical illustration of An illustration composited over a T2-weighted MRI showing a cervical spine injury from a sagittal view.  This patient was involved in an automobile accident which resulted in intervertebral disc herniations compressing the spinal cord, primarily at the level of C4/C5 and C6/C7.  The image also depicts a reverse curvature of the cervical spine, a common injury sustained after traumatic injuries such as whiplash, when muscles and tendons are strained during high velocity movements.
medical illustration of Carboniferous landscape drawing. The Carboniferous period extended from 345 to 280 million years ago and is characterized by the abundance of primitive vascular plants such as club mosses, ferns and horsetails. These often reached a height of 15 to 20 meters and contributed largely to the formation of coal seams. The fauna consisted mainly of insects, freshwater molluscs, fishes and some amphibians.
medical illustration of Illustration showing the formation of an accretionary prism. Comprised of marine sediments scraped off from the downgoing slab of oceanic crust or erosional products of volcanic island arcs that are accreted onto the non-subducting tectonic plate at a convergent plate boundary.
medical illustration of Fetus positions. At left, normal positioned fetus with their back forward and head positioned down. In middle, shoulder presentation where the fetus is sideways and their face is turned forward. At right, breech position where the fetus is faced forward and their buttocks are positioned at the bottom and head at the top. If the baby is in the shoulder or breech position a cesarean section is performed to deliver the baby.
medical illustration of Fusobacterium nucleatum, oral bacteria found in the dental plaque of humans. Associated with the periodontal gum disease.
medical illustration of Illustration showing an unhealthy heart artery with plaque.
medical illustration of A molecular model of amoxicillin, an antibiotic used to treat bacterial infections such as strep throat, urinary tract infections, salmonella, pneumonia, and lyme disease. Atoms are colored dark gray (carbon), light gray (hydrogen), red (oxygen), blue (nitrogen), and yellow (sulfur).
medical illustration of Illustration depicting carpal tunnel syndrome. Carpal tunnel happens when the median nerve is compressed at the wrist, and results in pain or numbness.
medical illustration of Illustrated pamphlet about acute and chronic bronchitis. Acute Bronchitis is an infection of the lungs, causing inflammation of the bronchial tubes. Chronic bronchitis is an ongoing condition in which the lining of the bronchial tubes is constantly infected or irritated causing long term coughing or colds.
medical illustration of A 3D illustration of the human brain highlighting the hippocampus and fornix.
medical illustration of Anatomical illustration of the human eye.
medical illustration of An illustration of the pancreas, duodenum and gallbladder.
medical illustration of An illustration comparing a normal brain and a brain affected by Alzheimer's disease, a progressive neurological disease that is the most common form of dementia. The disease is characterized by regional atrophy of the cerebral cortex and widening of the ventricles, leading to a loss of cognitive function. Damage to areas such as the hippocampus, which is responsible for memory formation, can lead to short term memory loss.
medical illustration of A molecular model of a breast cancer 1, early onset (BRCA1), a protein in breast cells that helps repair DNA or destroy mutated cells if their DNA cannot be repaired.
medical illustration of An illustration of psoriatic arthritis, a chronic skin condition (psoriasis) accompanied by arthritis and other joint problems. Aside from the appearance of red skin lesions and joint inflammation, changes in finger nails and dactylitis (swelling of fingers that create a sausage-like appearance) are characteristic of psoriatic arthritis.
medical illustration of Illustration of the anatomy of smell.
medical illustration of Illustrated diagram showing detailed chromosome structure, and depicting effects of telomerase in both aging cells and in cancer cells.
medical illustration of Illustration of the structure of a nephron (the basic structural and functional unit of the kidney) along side a cross section of a kidney. Depicted in the nephron are the glomerulus, bowman's capsule, proximal convoluted tubule, peritubular capillaries, descending limb, loop of henle, ascending limb, branch of renal artery, and branch of renal vein.
medical illustration of The female and male reproductive systems.
medical illustration of An illustration of gastric adenocarcinoma, also known as stomach cancer.  Stomach cancer is often asymptomatic early on, but can become malignant and spread to surrounding organs if left untreated.  The adenocarcinoma originates as an epithelial tumor in the gastric mucosa and will infiltrate the next layer of the gastric wall into the muscularis mucosa.
medical illustration of Illustration comparing a healthy heart (top inset), to a heart with pericarditis (bottom inset). Pericarditis is a condition in which the pericardium around the heart becomes inflamed. The pericardium is composed of two protective layers containing fluid that prevents friction from occurring. Potential causes of pericarditis include: viral, bacterial, or fungal infections, heart surgery, heart attack, various medications, and some medical conditions and injuries.
medical illustration of An illustration of the pathological features of Alzheimer's disease, a progressive brain disease that is the most common form of dementia.  The disease is characterized by the loss of neurons in the brain, leading to the degeneration of the cerebral cortex.


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