explanation: "The oblique pericardial sinus is a pocket-like recess within the pericardial cavity formed by the left atrium. It serves as a blind sac and does not have a specific physiological ...

Do you have a throbbing head and feel pressure around your eyes, cheeks, or forehead? You might have a sinus headache. A sinus headache is caused by inflammation and congestion in the sinuses ...

Download poster sets, covering topics like propaganda and the roles of individuals during the Holocaust, to use in your classroom. Are you an educator looking for resources for your classroom? Please ...