The adult human skeleton commonly is made of 206 named bones. These bones is usually grouped in two divisions: axial skeleton and appendicular skeleton.
continuous conduction – gradual propagation of the motion potential together an unmyelinated axon owing to voltage-gated Na+ channels Situated along all the length with the cell membrane.
atrioventricular bundle branches – (also, remaining or appropriate bundle branches) specialised myocardial conductile cells that arise through the bifurcation in the atrioventricular bundle and go through the interventricular septum; result in the Purkinje fibres and also to the correct papillary muscle by using the moderator band.
cervical enlargement – area on the ventral (anterior) horn from the spinal wire that features a larger population of motor neurons for your bigger variety of and finer control of muscles from the upper limb.
Defense of the heart, lungs, together with other organs and buildings while in the upper body generates a challenge somewhat different from that of the central nervous process. These organs, the operate of which includes movement, growth, and contraction, needs to have a versatile and elastic protecting covering. This kind of covering is supplied by the bony thoracic basket, or rib cage, which forms the skeleton of the wall on the upper body, or thorax.
coeliac trunk – (also, coeliac artery) important department with the abdominal aorta; provides rise to the remaining gastric artery, the splenic artery, and the widespread hepatic artery that kinds the hepatic artery to your liver, the best gastric artery towards the tummy, and read more also the cystic artery on the gall bladder.
depolarise – to decrease the voltage difference between The within and outdoors of the cell’s plasma membrane (the sarcolemma read more for the muscle mass fibre), building The within significantly less detrimental than at rest.
aponeurosis – wide, tendon-like sheet of connective tissue that attaches a skeletal muscle mass to another skeletal muscle or to the bone.
Cells, by way of example, Have got a cell membrane (also often called the plasma membrane) that keeps the intracellular surroundings—the fluids and organelles—different within the extracellular natural environment. Blood vessels keep blood inside a closed circulatory program, and nerves and muscles are wrapped in connective tissue sheaths that independent them from bordering structures.
diploid – ailment marked via the presence of the double enhance of genetic materials (two sets of chromosomes, one particular established inherited from Every single of two mothers and fathers).
blood colloidal osmotic stress (BCOP) – force exerted by colloids suspended in blood within a vessel; a Principal determinant will be the presence of plasma proteins.
bundle of His – (also, atrioventricular bundle) group of specialised myocardial conductile cells that transmit the impulse from your AV node through the interventricular septum; sort the left and proper atrioventricular bundle branches.
corpus albicans – non-useful structure remaining in the ovarian stroma subsequent structural and practical regression from the corpus luteum.
axon terminal – stop on the axon, where by there are generally a number of branches extending towards the goal cell.