Excretory System
Published on Nov 18, 2015
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PRESENTATION OUTLINE
EXCRETORY SYSTEM
BY NaThanielle Hughes
WHAT IS EXCRETION?
Excretion is the removal of unnecessary matter, waste, and excess water.
SKIN
The sweat glands in the skin release some metabolic waste through sweat, but this is really to maintain a good homeostasis through secretion.
THE URINARY SYSTEM
The urinary system is made up of the kidneys, ureters, bladder, and urethra. The purpose of this system is to clean the blood of unneeded waste and excess water and release it from the body.
KIDNEYS PART 1
The kidneys clean the blood and rid it of waste and excess water. This is done through the nephrons. Inside the nephrons are a bunch of capillaries, called a glomerulus. Around each glomerulus is a sac called a Bowmans capsule. The blood entering the glomerulus from the renal artery is pressurized, so water, glucose, and urea are pushed into the Bowmans capsule. The rest of the blood continues through the renal vein, through the blood vessels and returns to the heart. The leftover waste is then combined to make urine, which is sent to the bladder through the ureters.
NEPHRONS
The nephrons are inside the kidneys. They take in the needed material through reabsorption. They also take out the unnecessary material and waste through filtration. All the unneeded material that was excreted is then made into urine and sent through the ureters and into the bladder.
Photo by Hey Paul Studios
RESPIRATORY SYSTEM
The respiratory system is made up of the nose, trachea,lungs, and diaphragm. The purpose of this system is to take in oxygen, send it to the heart where it goes into the blood and to the rest of the body. Then, the deoxygenated blood returns to the heart and is sent back to the lungs, where it is breathed out of the body.
LUNGS
The lungs take in oxygen when the diaphragm pulls downward. The oxygen is then sent through capillaries leading to the heart. This oxygenated blood is sent through the aorta to the other arteries and throughout the body. When the deoxygenated blood returns to the heart through the veins and is sent back to the lungs. The carbon dioxide is then breathed out when the diaphragm pushes upward.
Photo by Pulmonary Pathology
