There are five layers of the epidermis. From surface to base, the layers are the stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum and stratum basalis.

The stratum corneum is composed of several layers of barrier cells and serves mostly for protection. The stratum lucidum is only found in the palms and soles and helps thicken the skin. The stratum granulosum contains lipids and fatty acids. The stratum spinosum contains some immune cells, as well as lipids. The stratum basalis contains melanocytes and mechanoreceptor cells attached to the basement membrane.

Endocrine organs are capable of secreting hormone signals into the blood. The heart releases atrial-natriuretic hormone, which stimulates vasodilation to reduce blood pressure and affects kidney function. The liver releases insulin-like growth factor in response to growth hormone, which has direct effects on stimulating cell growth and division. The kidneys release renin, which acts to increase blood pressure via sodium retention. The pancreas secretes insulin and glucagon to regulate blood glucose concentration.

The medulla oblongata is located in the brain stem and regulates several vital functions, such as respiration and heart rate. It performs these actions via action potentials and innervation, rather than the secretion of hormones.

There are five layers of the epidermis. From surface to base, the layers are the stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum and stratum basalis.

The stratum corneum is composed of several layers of barrier cells and serves mostly for protection. The stratum lucidum is only found in the palms and soles and helps thicken the skin. The stratum granulosum contains lipids and fatty acids. The stratum spinosum contains some immune cells, as well as lipids. The stratum basalis contains melanocytes and mechanoreceptor cells attached to the basement membrane.

There are five layers of the epidermis. From surface to base, the layers are the stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum and stratum basalis.

The stratum corneum is composed of several layers of barrier cells and serves mostly for protection. The stratum lucidum is only found in the palms and soles and helps thicken the skin. The stratum granulosum contains lipids and fatty acids. The stratum spinosum contains some immune cells, as well as lipids. The stratum basalis contains melanocytes and mechanoreceptor cells attached to the basement membrane.

Endocrine organs are capable of secreting hormone signals into the blood. The heart releases atrial-natriuretic hormone, which stimulates vasodilation to reduce blood pressure and affects kidney function. The liver releases insulin-like growth factor in response to growth hormone, which has direct effects on stimulating cell growth and division. The kidneys release renin, which acts to increase blood pressure via sodium retention. The pancreas secretes insulin and glucagon to regulate blood glucose concentration.

The medulla oblongata is located in the brain stem and regulates several vital functions, such as respiration and heart rate. It performs these actions via action potentials and innervation, rather than the secretion of hormones.

The correct answer is 5 roots. They are roots C5-C8 and T1.

The correct answer is 5 roots. They are roots C5-C8 and T1.

The correct answer is 5 roots. They are roots C5-C8 and T1.

Endocrine organs are capable of secreting hormone signals into the blood. The heart releases atrial-natriuretic hormone, which stimulates vasodilation to reduce blood pressure and affects kidney function. The liver releases insulin-like growth factor in response to growth hormone, which has direct effects on stimulating cell growth and division. The kidneys release renin, which acts to increase blood pressure via sodium retention. The pancreas secretes insulin and glucagon to regulate blood glucose concentration.

The medulla oblongata is located in the brain stem and regulates several vital functions, such as respiration and heart rate. It performs these actions via action potentials and innervation, rather than the secretion of hormones.

The meninges consist of three layers of connective tissue that surround the central nervous system. Dura mater is the thick outermost layer and serves to partition the central nervous system and meninges from the rest of the body. Arachnoid mater is the loose middle layer with a web-like appearance and helps cushion and protect the central nervous system. The subarachnoid space exists between the arachnoid and pia mater and is filled with cerebrospinal fluid. Pia mater is the delicate inner layer that adheres to the surface of the brain and spinal cord, creating one final barrier.