Endocrine System
The second major control system in the body and is responsible for regulating many of the variables controlling the body's internal environment
what is the Endocrine System
an extension of the brain tissue in the hypothalamus; nervous tissue; not true glandular tissue
what is Neurohypophysis (posterior pituitary)
The heart is approximately the size of a fist, and is located in the middle region of the thoracic cavity in a space called the
the middle layer, composed of cardiac muscle tissue
what is Myocardium
carry oxygen-rich blood away from the heart and deliver it to the body's organs and tissue
what are Arteries
chemical messengers produced by cells and released into the bloodstream, where they travel throughout the body
what are Hormones
hypothalamic hormones are sent directly to the anterior pituitary via a system of blood vessel
what is the Hypophyseal Portal System
the pointy inferior tip that points to the left side of the body and rests on the diaphragm
what is the Apex
the inner layer, composed of simple squamous epithelium on a layer of areolar connective tissue
what is Endocardium
blood returns to the heart by this; receive blood from the venules and return blood to the heart via the superior or inferior vena cava
what are Veins
located in the sphenoid bone, inferior to the hypothalamus
what is Hypophysis (pituitary gland)
group of cells in the Pancreas; also known as Islets of Langerhans
what is Pancreatic Islets
the outer layer; composed of dense irregular connective tisse
what is Fibrous Pericardium
the leaflets of both valves are attached by string-like structures; also known as heart strings
what is Chordae Tendineae
found closest to the heart and are the largest arteries in the body
what are Elastic Arteries
what is the infundibulum
Used to inhibit further hormone secretion: when a sufficient amount of hormone is released, it "feeds back" to decrease or prevent further release
what is Negative Feedback
the inner layer; composed of an outer parietal layer, which adheres to the fibrous pericardium, and an inner visceral layer
what is Serous Pericardium
smallest veins and receive blood from capillary beds in tissues and organs
what are Venules
true glandular tissue; hormones are secreted, stored and released from the cells
what is Adenohypophysis (anterior pituitary)
forms the outer layer of the heart wall; composed of simple squamous epithelium, areolar connective tissue, and adipose tissue
what is Epicardium
microscopic vessels where gas exchange occurs between the blood and tissue cells
what are Capillaries