Secreted by the Anterior Pituitary; Stimulates Ovulation and Progesterone secretion.
Luteal Phase
The Menstrual Phase in which there is a Corpus Luteum development; same as the Progestational or secretory Phase.
Luteal Cell
Corpus Luteum Cell that secretes Progesterone and Estrogen.
Lumen
The space in the Interior of a tubular structure, ie Artery or Intestine.
Lumbar
Relating to the region of the Back and Sides that lie between the Ribs and Pelvis.
Lower Respiratory Tract
The part of the Respiratory Tract below the Pharynx that includes the Larynx (Voice Box), Trachea (Wind Pipe), Bronchi, Bronchioles and the Alveoli of the Lungs.
Lower Extremity
The Lower Limb.
Lordosis
An abnormal Anterior Convex Curvature of the Spine.