anatomy human heart for Dummies

anatomy human heart for Dummies

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circle of Willis – (also, arterial circle) anastomosis Found at The bottom in the brain that assures continual blood supply; formed from branches of The interior carotid and vertebral arteries; provides blood on the brain.

annular ligament – intrinsic ligament from the elbow articular capsule that surrounds and supports The top in the radius for the proximal radioulnar joint.

codon – consecutive sequence of 3 nucleotides on an mRNA molecule that corresponds to a certain amino acid.

angiotensinogen – inactive protein during the circulation made by the liver; precursor of angiotensin I; needs to be modified by the enzymes renin and ACE to become activated.

cranial – describes a posture over or better than Yet another Element of the body appropriate; also known as outstanding.

atrial reflex – (also, referred to as Bainbridge reflex) autonomic reflex that responds to stretch receptors from the atria that send impulses to your cardioaccelerator region to increase HR when venous move in the atria raises.

anterior horn – gray matter read more from the spinal twine that contains multipolar motor neurons, at times generally known as the ventral horn.

cavernous sinus – enlarged vein that receives blood from the majority of the other cerebral veins and the eye socket, and contributes to the petrosal sinus.

antidiuretic hormone (ADH) – hypothalamic hormone that's stored from the posterior pituitary and that indicators the kidneys to reabsorb drinking water.

autonomic tone – contractile point out all through resting cardiac exercise made by mild sympathetic and parasympathetic stimulation.

aortic hiatus – opening within the diaphragm that permits passage in the thoracic aorta to the abdominal location check here exactly where it gets to be the abdominal aorta.

anaphylactic shock – variety of shock that follows a significant allergic reaction and benefits from substantial vasodilation.

Betz cells – output cells of the primary motor cortex that lead to musculature to move by means of synapses on cranial and spinal motor neurons.

anterior corticospinal tract – division from the corticospinal pathway that travels with the ventral (anterior) column in the spinal cord and controls axial musculature in the medial motor neurons inside the ventral (anterior) horn.