Hypodermis because of the melanin
The heart consists of four chambers in which blood flows. Blood enters the right atrium and passes through the right ventricle. The right ventricle pumps the blood to the lungs where it becomes oxygenated. The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium. From the left atrium blood flows into the left ventricle
Answer:
sickle cell anemia
Explanation:
People with sickle cell anemia have an abnormal version of hemoglobin. Hemoglobin is the protein that allows the red blood cell to carry oxygen through the body. This altered Hemoglobin is usually called sickle hemoglobin because of its "sickle" shape instead of the normal oval shape. Sickle Cell Anemia is hereditary.
Insomnia is defined as the inability to fall asleep, remain asleep, or get the amount of sleep an individual needs to wake up feeling rested. Its symptoms include difficulty falling asleep, frequent wake-ups during the night, waking up too early in the morning, daytime sleepiness, difficulty concentrating, and irritability. Insomnia can be acute (lasting one to several nights) or chronic (lasting from a month to years). It’s also the most common sleep complaint among Americans (especially women).
