excretion
No description yet. This curated deck is ready for daily study.
Card preview (24)
excretion
the removal of metabolic wastes from the body
metabolism
the sum total of chemical reactions that occur in a cell
what waste products are formed during metabolism ?
• excess water • CO2 • nitrogenous wastes (urea ,uric acid)
origin of CO2
it is formed as a by-product of cellular respiration
origin of excess water
formed as a by-product of cellular respiration and from the intake of fluid and food
origin of urea
formed in the liver from the deamination of excess amino acids
origin of bile pigments
formed in the liver during the breakdown of haemoglobin
origin of uric acid
the end product of metabolism of nucleic acids
blood vessels connected to the kidney
aorta-carries oxygenated blood ,food and waste products from the heart renal artery - carries blood from the aorta to supply the kidneys with oxygen and food and it brings the waste products to the kidney to be excreted inferior vena cava-carries deoxygenated blood and other substances from the kidneys back to the heart renal vein -carries deoxygenated blood ,purified of metabolic waste from the kidneys into the inferior vena cava
bladder
stores the urine
kidney
a excretory organ that filters nitrogenous waste out of the blood and produces urine
ureter
carries urine to the bladder
urethra
carries urine out of the body
what occurs in the hilum
the renal artery that enters the kidney ,the renal vein and ureter that exits the kidney
connective tissue membrane that surrounds the kidney
renal capsule
reddish brown region directly under the renal capsule
cortex
that inner region of the kidney, which is lighter in color and contains tubes which are arranged in groups
medulla
nephron
structural and functional units of the kidney , which is made up of 2 parts: malpighian body and renal tubule
malpighian body
found on the end of the nephron in the cortex ,
what is found in the malpighian body
a double-walled ,cup shaped structure called the bowmans capsule and inside the bowmans capsule is a capillary network of blood vessels called the glomerulus .
blood vessels that transport blood TO THE GLOMERULUS
Afferent arteriole
blood vessel that transports blood AWAY FROM the glomerulus
Efferent arteriole
cells with projections between in which small openings , filtration slits occur
podocytes
the cavity between the inner and outer wall of the bowmans capsule
cavity of the bowmans capsule