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Tour of the Human Body Systems

The Tour Starts Here!

The Immune System
The Nervous System
The Excretory System
The Respiratory System
The Circulatory Syatem
The Digestive System
The Skeletal System
The Muscular System
Glossary of Terms
The Excretory System Vocabulary

Active Transport: The ATP- dependent absorption or excretion of solutes across a cell membrane.
Adrenal Glands: Small endocrine gland secreting hormones, located suprerior to each kidney.
Aorta: Large, elastic artery that carries blood away from the left ventricle and into the systemic circiut.
Bladder: A muscular sac that distends as fluid is stored, and whose contraction ejects the fluid at the appropriate time.
Bowman's capsule: The initial segment of the renal tubule.
Excretion: Elimation from the body.
Filtration: Movement of a fluid across a membrane whose pores restrict the passage of solutes on the basis of size.
Kidney: A component of the urinary system; an organ functioning in the regulation of plasma composition including the excretion of wastes, and the maintenance of normal fluid and electrolyte balance.
Glomerulus:  A ball in the kidneys, a knot of capillares that projects into the enlarged, proximal end a nephron; the site of filtration the first step in the production of urine.
Nephron: Basic functional unit of the kidney.
Reabsorption: The removal of water and solutes from wastes.
Renal artery: Gives blood to the kidney.
Renal vein:  Takes the blood away from the kidneys.