Transcription
[Music] Smile and Learn. Hello friends! Today we're going to learn about one of the systems of the human body: the excretory system.
This system is made up of the urinary system and the sweat glands. But do you know the function of this system?
[Music] Just like cars get rid of what they don't need through the exhaust pipe, the human body also has to eliminate certain substances. Excretion is the removal of toxic substances that are present in our body, which could be harmful if they remain in our body. And what is responsible for collecting all of this waste that we don't need? Blood. Will you join me to discover what components make up the urinary system and the sweat glands? Let's go!
Urinary system. [Music] The main organs of the urinary system are the kidneys. They're dark red and bean-shaped. They're responsible for filtering waste from the blood. They act like strainers. The blood arrives with toxins it has collected from all over the body, and when it leaves, it's clean. It's like magic! And all that waste, where do you think it goes? That's right, to urine.
Urine is made up of those waste substances that the kidneys have been eliminating from the blood. However, urine contains a very high water percentage. Guess how much? 95 percent! Urine travels from the kidneys through tubes called ureters until it reaches the bladder. But what is the bladder? The bladder is a balloon-shaped organ that stores urine. Once it's full, urine is expelled outside the body through a tube called the urethra. Urination, or peeing, is what we call this liquid expulsion.
Sweat glands. Let's move on to another organ of the excretory system: the skin. And why is that? Because underneath it, we have sweat glands, which are also responsible for cleansing our body's blood by expelling sweat. [Music]
But what exactly is sweat? Sweat is a liquid that our body generates when we're hot or when we exercise. We expel sweat out through our pores, located on our skin. Did you know that 99% of sweat is water? The other 1% is made up of salts and substances that our body expels out. Sweating is also a method of cooling our body, which helps regulate body temperature. In one hour of intense exercise, our body can produce between three and four liters of sweat. Incredible! Don't forget to drink some water when you do sports.
Today, we have learned that our body expels two types of toxic waste substances: urine, thanks to the urinary system, and sweat, through pores located on the skin. Interesting, isn't it? See you soon! [Music]
We've learned so much in just one video. Did you know there are many more videos? Imagine how much you could learn! Subscribe to the Smile and Learn educational channel to learn and have fun at the same time. [Music]