circadian rhythm – inside perception of the day-to-day cycle of sunshine and darkish according to retinal action connected to daylight.
cuticle – in hair, the outermost layer of keratinocytes originating in the hair matrix, as noticed in a cross-segment of the hair bulb.
coracoclavicular ligament – solid band of connective tissue that anchors the coracoid technique of the scapula into the lateral clavicle; gives critical oblique aid with the acromioclavicular joint.
basal forebrain – nuclei with the cerebrum related to modulation of sensory stimuli and a focus by wide projections to the cerebral cortex, loss of which happens to be connected to Alzheimer’s disease.
cervical vertebrae – seven vertebrae numbered as C1–C7 that are located during the neck location on the vertebral column.
cauda equina – bundle of spinal nerve roots that descend from the lessen spinal wire under the very first lumbar vertebra and lie within the vertebral cavity; has the looks of a horse’s tail.
autonomic anxious program (ANS) – functional division of the anxious technique that is certainly responsible for homeostatic reflexes that coordinate Charge of cardiac and smooth muscle mass, in addition to glandular tissue.
Bachmann’s bundle – (also, interatrial band) team of specialised conducting cells that transmit the impulse directly from the SA node in the ideal atrium into the remaining atrium.
carotid sinuses – little pockets near the foundation of The interior carotid arteries which are the places with the baroreceptors and chemoreceptors that cause a reflex that aids within the regulation of vascular homeostasis.
The check here link on the ribs on the breastbone—the sternum—is in all instances a secondary one particular, brought about by the relatively pliable rib (costal) cartilages. The tiny joints in between the ribs and also the vertebrae allow a gliding movement from the ribs about the vertebrae in the course of breathing and other things to do. The motion is restricted from the ligamentous attachments concerning ribs more info and vertebrae.
acromioclavicular joint – articulation between the acromion in the scapula plus the acromial conclude with the clavicle.
alveolar duct – smaller tube that sales opportunities through the terminal bronchiole into the respiratory bronchiole and it is The purpose of attachment for alveoli.
descending aorta – percentage of the aorta that continues downward earlier the end on the aortic arch; subdivided into the thoracic aorta and the abdominal aorta.
alar plate – developmental area of the spinal twine that offers rise into the posterior horn on the gray subject.