It is somewhat flattened, considerably narrower than the gastric surface, and is in relation with the upper part of the anterior surface of the left kidney and occasionally with the left adrenal gland. Like the thymus, the spleen possesses only efferent lymphatic vessels. The spleen is part of the lymphatic system. Both the short gastric arteries and the splenic artery supply it with blood. The germinal centers are supplied by arterioles called penicilliary radicles.
It depends on how well your baby is sleeping at night. Some babies confuse their days and nights â sleeping more during the day than at night. One way to set your baby straight is to limit daytime naps â especially those in the late afternoon â to no more than three or four hours each. If your baby is napping for too long at the end of the day, it can make it harder for him or her to fall asleep at bedtime.
Most children under the age of 1 take two naps a day â usually one in the morning and another in the afternoon. By 18 months, most have given up the morning nap but still need an afternoon snooze to make it through dinner without a meltdown. Even when you've kissed the morning nap goodbye, your toddler's likely to continue needing her afternoon nap for quite some time. At age 4, more than 50 percent of children are still taking naps. And even though the majority of children (about 70 percent) stop napping at 5 years, 3 in 10 still need a nap at this age. That said, every child is different. Much depends on how many hours your toddler sleeps at night. Toddlers need approximately 12 to 14 hours of sleep in each 24-hour period. So if, for example, your child goes to bed at 8 p.m. and doesn't get up until 8 a.m., she may get her full quota of rest all at once, giving her no reason to need a nap. But if she doesn't get 12 hours at night, then ideally she should get some zzz's during the day.