Biology

Cricoid Cartilage Definition Cricoid cartilage is the ring-like formation at the base of the larynx. It is the only complete ring of cartilage around the…

Thyroid Cartilage Definition Thyroid cartilage is the largest cartilage of the larynx consisting of two laminae fusing anteriorly at an acute angle in the midline…

Hyoid Bone Definition Hyoid bone is the only bone located in the anterior neck. It is A U-shaped bone at the base of the tongue…

Soft Palate Definition Soft palate is the roof of the mouth in vertebrate animals, separating the mouth from the passages of the nose. It is…

Pharynx Definition Pharynx is the passage that leads from the cavities of the nose and mouth to the larynx (voice box) and esophagus. Air passes…

Trachea Definition Trachea is the tube in vertebrate animals that leads from the larynx to the bronchial tubes and carries air to the lungs. In…

Aortic Arch Definition Aortic arch is the curved portion between the ascending and descending portions of the aorta, lying behind the manubrium and giving rise…

Thoracic Diaphragm Definition Thoracic diaphragm is the large muscle that separates the chest cavity from the abdominal cavity in mammals and is the principal muscle…

Aorta Definition Aorta is the main artery of the circulatory system, arising from the left ventricle of the heart in mammals and birds and carrying…

Mitral Valve Definition Mitral valve is a valve of the heart, composed of two triangular flaps, that is located between the left atrium and left…

Heart Ventricle Definition Ventricle is a chamber of the heart that receives blood from one or more atria and pumps it by muscular contraction into…

Tricuspid Valve Definition Tricuspid valve is a valve of the heart, usually having three cusps, that is located between the right atrium and right ventricle…