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Valves of the Heart – Atrioventricular and Semilunar Valves

The Valves of the Heart are present in 2 pairs: (a) a pair of atrioventricular valves, and (b) a pair of semilunar valves. The valves prevent regurgitation of the blood. Atrioventricular Valves The left and right atria communicate with the left and right ventricles via left and

Fourth Ventricle

The 4th ventricle is a tent-like cavity of the hindbrain lined with ependyma and filled up with cerebrospinal fluid (csf), it’s situated in the posterior cranial fossa in front of the cerebellum and behind the pons and the upper part of medulla oblongata. The cavity of the

Third Ventricle

The 3rd ventricle is the cavity of diencephalon. It’s a midline slit-like cavity situated between 2 thalami and part of hypothalamus. It goes from the lamina terminalis anteriorly to the superior end of the cerebral aqueduct of the midbrain posteriorly. The cavity of the 3rd ventricle is

2nd Intercostal Space

2nd intercostal space starts from inferior portion of 2nd rib and ends at superior portion of 3rd rib. The intercostal spaces are the spaces amongst the two bordering ribs and their costal cartilages. On each side 11 intercostal spaces are present. Contents Each space contains the following

3rd Intercostal Spaces

3rd intercostal space starts from inferior portion of 3rd rib and ends at superior portion of 4th rib. The intercostal spaces are the spaces amongst the two bordering ribs and their costal cartilages. On each side 11 intercostal spaces are present. Contents Each space contains the following

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