Symptoms include: 1  excessive fatigue and exhaustion. 2  non-refreshing sleep (you get sufficient hours of sleep, but wake fatigued) 3  overwhelmed by or unable to cope with stressors. 4  feeling rundown or overwhelmed. 5  craving salty and sweet foods. 6  you feel most energetic in the evening.
The blastocyst is the second major stage of development, after the morula, for a newly fertilized individual once cell division has begun. Cells begin to differentiate, or become specialized, and have moved on to an outer/inner arrangement: the outer cells are called the trophoblast which will give rise to the placenta, and the inner are called the embryoblast (or inner cell mass) as they will give rise to the embryo.
nematocyst (nÄm'É-tÉ-sÄ­st', nÄ­-mÄt'É-sÄ­st') One of the minute capsules in the tentacles of cnidarians, such as jellyfish, hydras, or sea anemones, used for stinging. The capsule is produced by a special cell (called a cnidoblast) and contains a tightly coiled barbed thread that quickly shoots forth if the capsule's lid is disturbed. The thread often contains poison.