cholinergic system – neurotransmitter method of acetylcholine, which includes its receptors as well as the enzyme acetylcholinesterase.
atlantoaxial joint – series of three articulations involving the atlas (C1) vertebra and also the axis (C2) vertebra, consisting with the joints between the inferior articular processes of C1 as well as outstanding articular processes of C2, and the articulation involving the dens of C2 as well as anterior arch of C1.
bronchial bud – composition while in the creating embryo that kinds if the laryngotracheal bud extends and branches to form two bulbous buildings.
costoclavicular ligament – band of connective tissue that unites the medial clavicle with the 1st rib.
axillary artery – continuation with the subclavian artery mainly because it penetrates the body wall and enters the axillary location; provides blood for the area in the vicinity of The top from the humerus (humeral circumflex arteries); nearly all of the vessel continues into the brachium and gets to be the brachial artery.
complement – enzymatic click here cascade of constitutive blood proteins that have antipathogen consequences, including the immediate killing of bacteria.
brain – the massive organ with the central anxious procedure composed of white and gray make any difference, contained within the cranium and continual With all the spinal cord.
cortex – in hair, the 2nd or Center layer of keratinocytes originating in the hair matrix, as viewed in the cross-section of your hair here bulb.
aortic sinuses – smaller pockets inside the ascending aorta close to the aortic valve which can be the locations with the baroreceptors (stretch receptors) and chemoreceptors that induce a reflex that aids from the regulation of vascular homeostasis.
atrium – (plural = atria) higher or receiving chamber on the heart that pumps blood in the reduced chambers just previous to their contraction; the ideal atrium receives blood from the systemic circuit that flows into the ideal ventricle; the left atrium gets blood from the pulmonary circuit that flows to the still left ventricle.
activation gate – Section of the voltage-gated Na+ channel that opens when the membrane voltage reaches threshold.
cerebral peduncles – segments of the descending motor pathway which make up the white matter in the ventral midbrain.
bulbourethral glands – (also, Cowper’s glands) glands that secrete a lubricating mucus that cleans and lubricates the urethra just before and during ejaculation.
axon terminal – stop of the axon, in which there usually are a number of branches extending toward the goal mobile.