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The pancreas. This organ sits just below the stomach and is both an exocrine and an endocrine gland.
Cross-section of skin and a hair follicle. Note the shaft of the hair, the root, and papilla
Angioplasty. One form is called balloon angioplasty, shown here. A balloon catheter is threaded into
Sperm penetration of ovum
Children with disabilities used to be sent to special schools. In a process called mainstreaming or ...