Endocrine
A chemical messenger that travels in the bloodstream to act on specific target cells
Hormone
The formed element that transports oxygen
Erythrocyte
The muscular layer of the heart wall
Myocardium
Vessels that bring blood back toward the heart
Veins
Interstitial fluid that has entered lymphatic capillaries
Lymph
The release of hormones from the anterior pituitary is regulated by this gland; "the boss" of the pituitary
The leukocyte that responds most quickly to bacterial infections
Neutrophil
The chamber that pumps blood to the whole body
Left ventricle
Layer of blood vessels containing smooth muscle
Tunica media
Site of maturation of B lymphocytes
Bone marrow
This hormone acts to raise blood sugar when we have not eaten a meal for many hours
Glucagon
Term for the formation of new blood cells
Hematopoiesis
Located in the roof of the right atrium, this is the pacemaker of the heart, setting the heart rate
Sinoatrial node
Capillaries allowing movement of very large molecules including cells
Sinusoidal
Cell that engulfs and digests pathogens
This hormone decreases blood calcium levels
Calcitonin
The universal donor
Type O
Valve preventing backflow of blood into the right atrium
Tricuspid valve
The coronary arteries of branches of this vessel
Ascending aorta
Most abundant antibody circulating in bloodstream
IgG
This hormone causes the reabsorption of Na+, which causes reabsorption of water, increasing fluid volume and blood pressure
Aldosterone
Type of blood that would exhibit clumping in anti-B and anti-D wells
Atrial depolarization is represented by this on ECG
P-wave
Vessel diameter
Type of immunity represented by receiving immunoglobulins to fight a disease
Artificial passive immunity