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Hilus : مكان دخول شرايين الطحال
Trabecula : الحواجز بين جيوب الطحال
Dendritic cells : الشجيرات العصبية التابعه للعقدة
Germinal center :مركز الخلايا الجرثومية (الخلايا الام )
Medullary cords : الحبال النخاعية
Blood storage
The splenic artery enters the spleen through a fissure called the hilum and divides into numerous branches, assuming an appearance rather like a brush; they are sometimes called the brush arteries.
Each one of these arteries leads to a sinus whose function is to store the blood; when they are full the sinuses swell up and treble their volume. The spleen increases in volume while digestion is in progress and returns to its normal size when it is finished.
In emergencies such as hemorrhage, smooth muscle in the vessel walls and in the capsule of the spleen contracts. This squeezes the blood out of the spleen into the general circulation.
