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These circular orifices are located at the upper ends of the outflow parts of the left and right ventricles respectively. The pulmonary orifice which is 3 cms, is 0.5 cm larger than the aortic orifice. The aortic orifice is placed in front and to the right of the mitral orifice. The pulmonary orifice is placed above and to the left of the tricuspid orifice and the aortic orifice intervening between them. The pulmonary orifice is guarded by the pulmonary valve and the aortic orifice by the aortic valve. Each valve consists of three semilunar cusps. Each cusp is triangular. It has a convex edge which is attached to the part of the margin of the orifice. It has two free margins that meet at the apex of the cusp. Each cusp consists of a double fold of endocardium with some fibrous tissue in it. The region of the apex is thickened to form a nodule while crescentric parts near the free edges are called lunules.
PSYCHOPHARMACOLOGY: Psychotropic drugs are drugs used for mentally ill patients for psychotic and neurotic condition. 1) Antipsychotic or Neuroleptic Drugs and Anti-parki
While studying evolution, a student comes across a cladogram that includes clades like amphibia, reptilia, aves, and mammalia. What must be the basal clade?
Structure of Phloem In this we will explain the structural and functional relationship of phloem and compare it with xylem. The location of phloem with respect to other tissue
How do embryos of placental mammals excrete nitrogen wastes? Placental animals, as well as embryos, excrete urea. In the adult placental mammal urea is excreted by the urine.
Pollen Tube Structure The pollen tube in the stigma is filled with cytoplasm containing numerous mitochondria and dictyosomes. The number of dictyosome cisternae is reduced i
Discuss the following term in brief - Adaptive radiation Evolution of a variety of different species from a single common ancestor. Each is adapted for a particular niche, and
What is the function of the antidiuretic hormone? Where is it made and which are the stimuli that enhance or decrease its secretion? The antidiuretic hormone is secreted by the
Q What is the difference between catabolism and anabolism? Metabolism comprises two opposing processes: catabolism and anabolism. Anabolism is a set of synthesis reactions that
The diet prescription The diet prescription designates the type, amount and frequency of feeding based on an individual's disease process and disease management goals. The dis
Determine the main four events of bone remodeling Quiescence refers to the resting state of the bone surface. This includes all of the bone surfaces. Activation is the recr
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