£ Sternomastoid Quick Reference: Large muscle at the side of the neck.

§ Advanced Reference: The muscle extends from the top of the sternum and

■I clavicle to the skull behind the ear. It facilitates flexing of the head and rotation of the neck. Also a common landmark during CVP cannulation.

o o> Sternum Quick Reference: Breast bone.

Advanced Reference: Flat bone at the front of the chest to which the upper ribs are attached. The upper part, or manubrium, slopes downwards and forwards making an angle with the vertical body section. A joint

Stripper between manubrium and body allows the sternum to straighten when the ribs rise during inspiration.

Steroids Quick Reference: Naturally occurring and synthetic agents based on sterone.

Advanced Reference: In the body they include hormones of the adrenal cortex and sex glands (e.g. oestrogens).

Stethoscope Quick Reference: Instrument used to listen to interior body sounds.

Advanced Reference: Used mainly for listening to heart and lungs. Invented by a French physician. Traditionally consists of listening attachments fitted to rubber tubing, but variation are available for listening to foetal heartbeat in the uterus (manual and electronic) as well as oesopha-geal stethoscopes used during anaesthesia.

Stoma Quick Reference: A mouth-like opening.

Advanced Reference: Usually refers to an artificial opening made in the skin surface as a collection point for various internal anatomy, e.g. colostomy and ileostomy.

Stomach Quick Reference: That part of the digestive tract between the lower end of the oesophagus and the beginning of the intestine.

Advanced Reference: The first part of the stomach is the fundus, which forms a dome under the left side of the diaphragm. The second part, the body, broadens out and runs down from the fundus to the third part, the antrum, which is funnel shaped and runs upwards to the right and ends in the midline of the body at the pylorus, a muscular tube acting as a valve between the stomach and the duodenum.

Streptokinase Quick Reference: (strep-toe-ki-an-ase) Enzyme used therapeutically as a fibrinolytic drug, e.g. streptase.

Advanced Reference: Used to break down blood clots, useful in the treatment of thrombosis and embolism.

Streptomycin Quick Reference: Antibiotic.

Advanced Reference: Mostly used now in the treatment of tuberculosis n (TB) and usually in combination with other antibiotics. <

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