it marks the position of the second rib
The second pair of ribs or the True ribs
at the level of the inter-vertebral disc between T4 and T5.
Sternal refers to the sternum, which is the breast bone.
The sternal area is around the sternum (breastbone) in the center of the chest.
8 are sternal & 10 are asternal.
The xyphoid process is the inferior sternal bony landmark.
Sternal angle-manubriosternal joint-anterior angle formed by junction of manubrium and body of sternum-approximately 140 degreesignificant because:it lies just anterior to arch of aorta -marks the starting and ending of the aortic archanterior to the Corina (point of bifurcation of trachea into 2 main bronchi)It corresponds to the invertebral disc between T4 and T5 vertebraat the level of second pair of coastal cartilagemark superior boundary of inferior mediastinum
This results in intercostal and sternal recession in small children with airway obstruction.
The cosine function is an even function which means that cos(-x) = cos(x). So, if cos of an angle is positive, then the cos of the negative of that angle is positive and if cos of an angle is negative, then the cos of the negative of that angle is negaitive.
No. The sine of an angle is not directly proportional to the angle. It is a function of the angle, but it is periodic, repeating every 360 degrees of the angle.
The cosine function is mathematical equation to determine the adjacent angle of a triangle. The cosine of an angle is the ratio of the length of the hypotenuse: so called because it is the sine of the co-angle.