Search results
Results from the WOW.Com Content Network
A pulse deficit between the PMI and periphery may occur in some arrhythmias, such as premature ventricular contraction or atrial fibrillation. Sustained apex beat, namely prolonged upward cardiac force during systole in a physical exam, can be seen in some chronic conditions such as hypertension and aortic stenosis, especially in elderly and ...
The apical ectodermal ridge (AER) is a structure that forms from the ectodermal cells at the distal end of each limb bud and acts as a major signaling center to ensure proper development of a limb. After the limb bud induces AER formation, the AER and limb mesenchyme —including the zone of polarizing activity (ZPA)—continue to communicate ...
A child aged 1–3 years old can have a heart rate of 80–130 bpm, a child aged 3–5 years old a heart rate of 80–120 bpm, an older child (age of 6–10) a heart rate of 70–110 bpm, and an adolescent (age 11–14) a heart rate of 60–105 bpm. [12] An adult (age 15+) can have a heart rate of 60–100 bpm. [12]
In medicine, the pulse is the rhythmic throbbing of each artery in response to the cardiac cycle (heartbeat). [1] The pulse may be palpated in any place that allows an artery to be compressed near the surface of the body, such as at the neck (carotid artery), wrist (radial artery or ulnar artery), at the groin (femoral artery), behind the knee (popliteal artery), near the ankle joint ...
Apical constriction mechanisms (red: filamentous actin. orange: myosin.) Apical constriction occurs primarily through the contraction of cytoskeletal elements. The specific mechanism depends on the species, the cell type, and the morphogenetic movement. Model organisms that have been studied include the frog Xenopus, and the fly Drosophila.
The cardiovascular centre, or cardiovascular center, is part of the medulla oblongata of the brainstem. [1] [2] Normally, the heart beats without nervous control. In some situations, such as exercise, and major trauma, the cardiovascular centre is responsible for altering heart rate. It also mediates respiratory sinus arrhythmia.
[2] [3] The major way health care providers examine the heart on physical exam is heart auscultation; [3] another clinical technique is palpation, which can detect by touch when such turbulence causes the vibrations called cardiac thrill. [4] A murmur is a sign found during the cardiac exam. Murmurs are of various types and are important in the ...
The quiescent centre is a group of cells, up to 1,000 in number, in the form of a hemisphere, with the flat face toward the root tip of vascular plants. [1] It is a region in the apical meristem of a root where cell division proceeds very slowly or not at all, but the cells are capable of resuming meristematic activity when the tissue surrounding them is damaged.