... exchanges gases with the body and its environment.

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Presentation transcript:

... exchanges gases with the body and its environment. Respiratory System ... ... exchanges gases with the body and its environment.

Animals exchange gases (Respire) in several different ways... 2 Animals exchange gases (Respire) in several different ways... 2

Some with gills,

Some with body tubes,

Some, by diffusion through their skin or cell membrane,

and many use LUNGS!

Lungs exchange Oxygen and Carbon Dioxide Human Respiration Lungs exchange Oxygen and Carbon Dioxide

False The lungs are just spongy organs that fill with air... T or F The lungs breathe. False The lungs are just spongy organs that fill with air...

... the organ that causes you to breathe is the Diaphragm- Muscle below ribcage that causes you to breathe

“breathing in”. The diaphragm pulls down and the ribcage expands. 1. Inhalation “breathing in”. The diaphragm pulls down and the ribcage expands.

“breathing out” the diaphragm moves up and the ribcage pushes in. 2. Exhalation “breathing out” the diaphragm moves up and the ribcage pushes in.

Respiratory Parts and Functions Nose- traps dust Nasal Chamber- warms air Epiglottis- covers windpipe while swallowing Trachea- windpipe vocal cords

Bronchi- tubes to lungs Bronchioles- small tubes within lungs

Alveoli- air sacs within lungs that exchange gases with the bloodstream. One cell thin.

Alveoli have enough surface area from one person’s lungs to cover the floor of a basketball court!

... carbon dioxide from the blood diffuses into the alveoli and oxygen from the alveoli diffuses into the blood.

... removes cellular wastes from the bloodstream. Dirty Blood Excretory System ... removes cellular wastes from the bloodstream. Clean Blood ...also called Urinary System

Cellular Wastes Carbon dioxide- produced when oxygen is burned. Ammonia- produced when glucose is burned. Often converted to urea(liquid waste) by the liver.

Other Wastes Water- when in excess Salt- when in excess Foreign Chemicals- pollutants, alcohol, drugs, food additives, etc.

Animals excrete cellular wastes in several ways!

One - celled animals release wastes by simple diffusion out the cell membrane.

Worms collect liquid cellular wastes in small tubes and excrete out their skin.

Insects reabsorb water and release their cellular waste with leftover food out their anus.

Most animals, including. humans, have. kidneys,. specialized Most animals, including humans, have kidneys, specialized organs for removing cellular wastes from the blood. Pig ureter

Human Excretory Organs Lungs- removes CO2 and water Skin- removes water, salts, some CO2 and urea Kidney- main organ of excretion (except CO2)

Human Plumbing Kidney Ureter Bladder Urethra

How a Kidney Works ... blood passes through the kidney and wastes are collected and sent to the urinary bladder.

...nephrons filter the wastes out of the blood by diffusion. Inside the Kidney ...nephrons filter the wastes out of the blood by diffusion.

Nephrons are very small Nephrons are very small. Thousands of them collect wastes and water(urine) which is sent to the urinary bladder. Nephron 2ls30353

... is a muscular organ that expands to hold urine. Urinary Bladder... ... is a muscular organ that expands to hold urine.

... removes cellular wastes Excretory System ... ... removes cellular wastes