Biology

Capillary Definition Capillary is any of the tiny blood vessels that connect the smallest arteries (arterioles) to the smallest veins (venules). Capillaries form a network…

About Artery Definition Artery is any of the blood vessels that carry oxygenated blood away from the heart to the body’s cells, tissues, and organs.…

Retina Definition Retina is the light-sensitive membrane that lines the inside of the back of the eyeball and connects to the brain by the optic…

About Cornea Definition Cornea is the clear, dome­shaped surface that covers the front of the eye and it is the eye’s outermost layer. It lies…

Lens (Anatomy) Definition Lens is a transparent structure behind the iris of the eye that focuses light entering the eye on the retina. The lens…

Blood Vessel Definition Blood vessel is an elastic tube or passage in the body through which blood circulates; an artery, a vein, or a capillary.…

About Fascia Definition Fascia is the body’s connective tissue, it is a head to toe, inside to out, all-encompassing and interwoven system of fibrous connective…

Median Nerve Definition Median nerve is a nerve which runs through the wrist and into the hand. It provides sensation and some movement to the…

Ulnar Artery Definition Ulnar artery is a large artery branching from the brachial artery, supplying muscles in the forearm, wrist, and hand. Arising near the…

Ulnar Nerve Definition Ulnar nerve is a nerve which runs near the ulna bone. It is a major nerve in the upper extremity that supplies…

Coccyx Definition Coccyx is a small triangular bone at the base of the spine in humans and apes. It is composed of several fused vertebrae.…

About Sacrum Definition Sacrum is a triangular bone at the base of the spine, above the coccyx (tailbone) that forms the rear section of the…